diff --git a/navigation.html b/navigation.html
index 874ffa7..b1506d4 100644
--- a/navigation.html
+++ b/navigation.html
@@ -14,7 +14,6 @@
       <a href="t-konto.html">T-Konten</a>
       <a href="buchungssatz.html">Buchungssatz</a>
       <a href="vorkontierung.html">Vorkontierung</a>
-      <a href="taschenrechner.html">Taschenrechner</a>
     </div>
   </div>
   <div class="dropdown">
diff --git a/taschenrechner.html b/taschenrechner.html
deleted file mode 100644
index c2319db..0000000
--- a/taschenrechner.html
+++ /dev/null
@@ -1,545 +0,0 @@
-<!DOCTYPE html>
-<html lang="de">
-
-<head>
-    <meta charset="UTF-8">
-    <meta name="viewport" content="minimum-scale=1">
-    <title>Buchführung</title>
-    <link rel="stylesheet" href="css/style.css">
-    <script src="js/html2canvas.min.js"></script>
-    <script src="js/js-yaml.min.js"></script>
-    <script src="js/kontenplan.js"></script>
-    <script src="js/clipboard.min.js"></script>
-    <script src="js/menu.js"></script>
-    <style>
-        .taschenrechner #calc {
-            background: #d33f01;
-            border: 1px solid #d33f01;
-            border-radius: 0.5em;
-            box-shadow: inset 0 0 5px white;
-            display: inline-block;
-            padding: 1em 0;
-            text-align: center;
-            width: 240px;
-            line-height: 1.5;
-            font-size: medium;
-        }
-
-        .taschenrechner #calc output {
-            display: block;
-            height: 30px;
-            background: white;
-            text-align: right;
-            font-size: 1.1rem;
-            padding-right: 5%;
-            margin: 5px 6%;
-            overflow: auto;
-        }
-
-        :fullscreen #taschenrechner {
-            position: absolute;
-            right: 5%;
-            top: 10%;
-        }
-
-        :fullscreen output {
-            position: fixed;
-            right: 50%;
-            font-size: calc(44px + (160 - 44) * ((100vw - 320px) / (1600 - 320))) !important;
-            bottom: 10%;
-            transform: translateX(50%);
-            width: 70%;
-            height: auto !important;
-            pointer-events: none;
-        }
-
-        :fullscreen #calcToggleButton {
-            display: none;
-        }
-
-        #taschenrechner-fullscreen::backdrop {
-            background-color: rgba(0, 0, 0, 0.5);
-        }
-
-        #taschenrechner-fullscreen {
-            pointer-events: none;
-        }
-
-        output {
-            pointer-events: all;
-        }
-
-        .taschenrechner #calc fieldset {
-            border: none;
-            margin: 0 auto;
-            padding-bottom: 0;
-        }
-
-        .taschenrechner #calc button {
-            cursor: pointer;
-            margin: 5px 2%;
-            width: 40px;
-            line-height: 1.5em;
-            font-size: 1em;
-            white-space: nowrap;
-            border: none;
-            border-radius: 50%;
-            color: #0f6cbf;
-            aspect-ratio: 1 / 1;
-            pointer-events: auto;
-        }
-
-        .taschenrechner #usage {
-            display: inline-block;
-            padding: 0 0 0 2em;
-            vertical-align: top;
-        }
-    </style>
-
-</head>
-<main>
-    <div w3-include-html="navigation.html"></div>
-    <h2>Taschenrechner</h2>
-    <div id="taschenrechnerForm" class="box">
-        <div id="taschenrechner-fullscreen">
-            <div id="taschenrechner" class="taschenrechner" tabindex="0">
-                <form id="calc">
-                    <button id="calcToggleButton"
-                        style="float:right;border-radius:0;height:30px;width:30px;padding:2px;">
-                        <svg xmlns="http://www.w3.org/2000/svg" height="24px" width="28px" viewBox="0 0 512 512">
-                            <path
-                                d="M32 32C14.3 32 0 46.3 0 64v96c0 17.7 14.3 32 32 32s32-14.3 32-32V96h64c17.7 0 32-14.3 32-32s-14.3-32-32-32H32zM64 352c0-17.7-14.3-32-32-32s-32 14.3-32 32v96c0 17.7 14.3 32 32 32h96c17.7 0 32-14.3 32-32s-14.3-32-32-32H64V352zM320 32c-17.7 0-32 14.3-32 32s14.3 32 32 32h64v64c0 17.7 14.3 32 32 32s32-14.3 32-32V64c0-17.7-14.3-32-32-32H320zM448 352c0-17.7-14.3-32-32-32s-32 14.3-32 32v64H320c-17.7 0-32 14.3-32 32s14.3 32 32 32h96c17.7 0 32-14.3 32-32V352z" />
-                        </svg>
-                    </button>
-                    <output tabindex="0">0</output>
-                    <fieldset style="clear:right;padding-top:5%;">
-                        <button>√</button>
-                        <button>x²</button>
-                        <button>ln</button>
-                        <button>C</button>
-                        <button>7</button>
-                        <button>8</button>
-                        <button>9</button>
-                        <button>+</button>
-                        <button>4</button>
-                        <button>5</button>
-                        <button>6</button>
-                        <button>-</button>
-                        <button>1</button>
-                        <button>2</button>
-                        <button>3</button>
-                        <button>×</button>
-                        <button>0</button>
-                        <button>.</button>
-                        <button>=</button>
-                        <button>÷</button>
-                    </fieldset>
-                </form>
-            </div>
-        </div>
-
-        <p>Ein einfacher Taschnenrechner, der in Moodle bzw. in die mebis Lernplattform eingebunden werden kann.
-            Grundlage ist der <a
-                href="https://wiki.selfhtml.org/wiki/JavaScript/Tutorials/Taschenrechner">Taschenrechner von
-                selfhtml</a>.
-        </p>
-        <h3>Anpassungen</h3>
-        <ul>
-            <li>Farbanpassung an mebis Lernplattform</li>
-            <li>Vergrößerte Ansicht: Display kann zu Demonstrationszwecken per Button ein- und ausgeklappt werden</li>
-        </ul>
-        <h3>In Moodle integrieren</h3>
-        <ul>
-            <li>Sicherheitshalber eine Sicherung des Kurses erstellen (optional).</li>
-            <li>Texteditor in den Einstellungen ausschalten ("Einfacher Editor").</li>
-            <li>Den folgenden Code kopieren und in ein Textfeld, zum Beispiel im Seitenblock, einfügen.</li>
-        </ul>
-        <pre><textarea readonly="readonly" cols="80" rows="12">
-            <style>
-                .taschenrechner #calc {
-                    background: #d33f01;
-                    border: 1px solid #d33f01;
-                    border-radius: 0.5em;
-                    box-shadow: inset 0 0 5px white;
-                    display: inline-block;
-                    padding: 1em 0;
-                    text-align: center;
-                    width: 240px;
-                    line-height: 1.5;
-                    font-size: medium;
-                }
-        
-                .taschenrechner #calc output {
-                    display: block;
-                    height: 30px;
-                    background: white;
-                    text-align: right;
-                    font-size: 1.1rem;
-                    padding-right: 5%;
-                    margin: 5px 6%;
-                    overflow: auto;
-                }
-        
-                :fullscreen #taschenrechner {
-                    position: absolute;
-                    right: 5%;
-                    top: 10%;
-                }
-        
-                :fullscreen output {
-                    position: fixed;
-                    right: 50%;
-                    font-size: calc(44px + (160 - 44) * ((100vw - 320px) / (1600 - 320))) !important;
-                    bottom: 10%;
-                    transform: translateX(50%);
-                    width: 70%;
-                    height: auto !important;
-                 pointer-events: none;
-                }
-        
-                :fullscreen #calcToggleButton {
-                    display: none;
-                }
-        
-                #taschenrechner-fullscreen::backdrop {
-                    background-color: rgba(0, 0, 0, 0.5);
-                }
-                
-                #taschenrechner-fullscreen {
-                    pointer-events: none;
-                }
-        output {
-                    pointer-events: all;
-        }
-        
-                .taschenrechner #calc fieldset {
-                    border: none;
-                    margin: 0 auto;
-                    padding-bottom: 0;
-                }
-        
-                .taschenrechner #calc button {
-                    cursor: pointer;
-                    margin: 5px 2%;
-                    width: 40px;
-                    line-height: 1.5em;
-                    font-size: 1em;
-                    white-space: nowrap;
-                    border: none;
-                    border-radius: 50%;
-                    color: #0f6cbf;
-                    aspect-ratio: 1 / 1;
-                    pointer-events: auto;
-                }
-        
-                .taschenrechner #usage {
-                    display: inline-block;
-                    padding: 0 0 0 2em;
-                    vertical-align: top;
-                }
-            </style>
-        </head>
-        <body>
-            <div id="taschenrechner-fullscreen">
-                <div id="taschenrechner" class="taschenrechner" tabindex="0">
-                    <form id="calc">
-                        <button id="calcToggleButton" style="float:right;border-radius:0;height:30px;width:30px;padding:2px;">
-                            <svg xmlns="http://www.w3.org/2000/svg" height="24px" width="28px" viewBox="0 0 512 512">
-                                <path d="M32 32C14.3 32 0 46.3 0 64v96c0 17.7 14.3 32 32 32s32-14.3 32-32V96h64c17.7 0 32-14.3 32-32s-14.3-32-32-32H32zM64 352c0-17.7-14.3-32-32-32s-32 14.3-32 32v96c0 17.7 14.3 32 32 32h96c17.7 0 32-14.3 32-32s-14.3-32-32-32H64V352zM320 32c-17.7 0-32 14.3-32 32s14.3 32 32 32h64v64c0 17.7 14.3 32 32 32s32-14.3 32-32V64c0-17.7-14.3-32-32-32H320zM448 352c0-17.7-14.3-32-32-32s-32 14.3-32 32v64H320c-17.7 0-32 14.3-32 32s14.3 32 32 32h96c17.7 0 32-14.3 32-32V352z"/>
-                            </svg>
-                        </button>
-                        <output tabindex="0">0</output>
-                        <fieldset style="clear:right;padding-top:5%;">
-                            <button>√</button>
-                            <button>x²</button>
-                            <button>ln</button>
-                            <button>C</button>
-                            <button>7</button>
-                            <button>8</button>
-                            <button>9</button>
-                            <button>+</button>
-                            <button>4</button>
-                            <button>5</button>
-                            <button>6</button>
-                            <button>-</button>
-                            <button>1</button>
-                            <button>2</button>
-                            <button>3</button>
-                            <button>×</button>
-                            <button>0</button>
-                            <button>.</button>
-                            <button>=</button>
-                            <button>÷</button>
-                        </fieldset>
-                    </form>
-                </div>
-            </div>
-            <script>
-    "use strict";
-    document.addEventListener("DOMContentLoaded", function () {
-        var form = document.getElementById("calc"),
-            out = document.querySelector("#calc output"),
-            overwrite = true;
-
-        function clear() {
-            event.preventDefault();
-            event.stopPropagation();
-            out.textContent = 0;
-            overwrite = true;
-        }
-
-        function input(c) {
-            event.preventDefault();
-            event.stopPropagation();
-            if (overwrite) {
-                out.textContent = (c == "." ? "0." : c);
-            } else {
-                out.textContent += c;
-            }
-            overwrite = false;
-        }
-
-        function operator(c) {
-            event.preventDefault();
-            event.stopPropagation();
-            out.textContent += " " + c + " ";
-            overwrite = false;
-        }
-
-        function getMaxDecimalPlaces(input) {
-            let maxDecimalPlaces = 0;
-            let parts = input.split(/[\+\-\×\÷\*\/]/);
-            parts.forEach(part => {
-                let decimalPart = part.split('.')[1];
-                if (decimalPart && decimalPart.length > maxDecimalPlaces) {
-                    maxDecimalPlaces = decimalPart.length;
-                }
-            });
-            return maxDecimalPlaces;
-        }
-
-        function result(noDisplay) {
-            event.preventDefault();
-            event.stopPropagation();
-            var input = out.textContent,
-                r = 0;
-            input = input.replace(/×/g, "*").replace(/÷/g, "/");
-            input = input.replace(/[^0-9. +\-*\/]/g, "");
-
-            var decimalPlaces = getMaxDecimalPlaces(input);
-
-            try {
-                r = eval(input);
-                r = parseFloat(r.toFixed(decimalPlaces));  // Runde das Ergebnis auf die angegebene Anzahl Dezimalstellen
-            } catch (e) {
-                r = 0;
-            }
-            if (noDisplay !== true) {
-                out.textContent = r;
-                overwrite = true;
-            }
-            return r;
-        }
-
-        if (out) {
-            form.addEventListener("submit", function (ev) {
-                return false;
-            });
-            document.querySelectorAll("#calc button").forEach(function (b) {
-                var c = b.textContent;
-                switch (c) {
-                    case "9":
-                    case "8":
-                    case "7":
-                    case "6":
-                    case "5":
-                    case "4":
-                    case "3":
-                    case "2":
-                    case "1":
-                    case "0":
-                    case ".":
-                        b.addEventListener("click", function () {
-                            input(c);
-                        });
-                        break;
-                    case "+":
-                    case "-":
-                    case "×":
-                    case "÷":
-                        b.addEventListener("click", function () {
-                            operator(c);
-                        });
-                        break;
-                    case "=":
-                        b.addEventListener("click", result);
-                        break;
-                    case "C":
-                        b.addEventListener("click", clear);
-                        break;
-                }
-            });
-
-            // Keyboard support
-            document.addEventListener("keydown", function (ev) {
-                // Focus must be inside the calculator
-                if (!form.contains(document.activeElement)) return;
-
-                if (ev.key === "Enter" || ev.key === "=") {
-                    result();
-                } else if (ev.key === "Backspace" || ev.key === "Delete") {
-                    clear();
-                } else if (ev.key === "c" || ev.key === "C") {
-                    clear();
-                } else if (!isNaN(ev.key) || ev.key === ".") {
-                    input(ev.key);
-                } else if (["+", "-", "*", "/"].includes(ev.key)) {
-                    operator(
-                        ev.key.replace("*", "×").replace("/", "÷")
-                    );
-                }
-            });
-        }
-    });
-            </script>
-        </textarea></pre>
-    </div>
-</main>
-
-<div w3-include-html="footer.html"></div>
-
-<script>
-    includeHTML();
-</script>
-<script>
-    "use strict";
-    document.addEventListener("DOMContentLoaded", function () {
-        var form = document.getElementById("calc"),
-            out = document.querySelector("#calc output"),
-            overwrite = true;
-
-        function clear() {
-            event.preventDefault();
-            event.stopPropagation();
-            out.textContent = 0;
-            overwrite = true;
-        }
-
-        function input(c) {
-            event.preventDefault();
-            event.stopPropagation();
-            if (overwrite) {
-                out.textContent = (c == "." ? "0." : c);
-            } else {
-                out.textContent += c;
-            }
-            overwrite = false;
-        }
-
-        function operator(c) {
-            event.preventDefault();
-            event.stopPropagation();
-            out.textContent += " " + c + " ";
-            overwrite = false;
-        }
-
-        function getMaxDecimalPlaces(input) {
-            let maxDecimalPlaces = 0;
-            let parts = input.split(/[\+\-\×\÷\*\/]/);
-            parts.forEach(part => {
-                let decimalPart = part.split('.')[1];
-                if (decimalPart && decimalPart.length > maxDecimalPlaces) {
-                    maxDecimalPlaces = decimalPart.length;
-                }
-            });
-            return maxDecimalPlaces;
-        }
-
-        function result(noDisplay) {
-            event.preventDefault();
-            event.stopPropagation();
-            var input = out.textContent,
-                r = 0;
-            input = input.replace(/×/g, "*").replace(/÷/g, "/");
-            input = input.replace(/[^0-9. +\-*\/]/g, "");
-
-            var decimalPlaces = getMaxDecimalPlaces(input);
-
-            try {
-                r = eval(input);
-                r = parseFloat(r.toFixed(decimalPlaces));  // Runde das Ergebnis auf die angegebene Anzahl Dezimalstellen
-            } catch (e) {
-                r = 0;
-            }
-            if (noDisplay !== true) {
-                out.textContent = r;
-                overwrite = true;
-            }
-            return r;
-        }
-
-        if (out) {
-            form.addEventListener("submit", function (ev) {
-                return false;
-            });
-            document.querySelectorAll("#calc button").forEach(function (b) {
-                var c = b.textContent;
-                switch (c) {
-                    case "9":
-                    case "8":
-                    case "7":
-                    case "6":
-                    case "5":
-                    case "4":
-                    case "3":
-                    case "2":
-                    case "1":
-                    case "0":
-                    case ".":
-                        b.addEventListener("click", function () {
-                            input(c);
-                        });
-                        break;
-                    case "+":
-                    case "-":
-                    case "×":
-                    case "÷":
-                        b.addEventListener("click", function () {
-                            operator(c);
-                        });
-                        break;
-                    case "=":
-                        b.addEventListener("click", result);
-                        break;
-                    case "C":
-                        b.addEventListener("click", clear);
-                        break;
-                }
-            });
-
-            // Keyboard support
-            document.addEventListener("keydown", function (ev) {
-                // Focus must be inside the calculator
-                if (!form.contains(document.activeElement)) return;
-
-                if (ev.key === "Enter" || ev.key === "=") {
-                    result();
-                } else if (ev.key === "Backspace" || ev.key === "Delete") {
-                    clear();
-                } else if (ev.key === "c" || ev.key === "C") {
-                    clear();
-                } else if (!isNaN(ev.key) || ev.key === ".") {
-                    input(ev.key);
-                } else if (["+", "-", "*", "/"].includes(ev.key)) {
-                    operator(
-                        ev.key.replace("*", "×").replace("/", "÷")
-                    );
-                }
-            });
-        }
-    });
-</script>
-</main>
-</body>
-
-</html>
\ No newline at end of file
