open_in_new content_copy 
calculator.html
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Scientific Calculator</title>
    <style>
        body {
            font-family: Arial, sans-serif;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            height: 100vh;
            background-color: #f4f4f4;
        }

        #calculator {
            border: 1px solid #ccc;
            border-radius: 8px;
            padding: 20px;
            background-color: white;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
        }

        #display {
            width: 100%;
            height: 40px;
            text-align: right;
            font-size: 24px;
            border: 1px solid #ccc;
            margin-bottom: 10px;
            padding: 5px;
            border-radius: 5px;
        }

        button {
            width: 60px;
            height: 60px;
            font-size: 20px;
            margin: 5px;
            border: none;
            border-radius: 5px;
            background-color: #6200ea;
            color: white;
            cursor: pointer;
            transition: background-color 0.3s;
        }

        button:hover {
            background-color: #3700b3;
        }

        .row {
            display: flex;
        }
    </style>
</head>
<body>

<div id="calculator">
    <input type="text" id="display" disabled>
    <div class="row">
        <button onclick="appendToDisplay('7')">7</button>
        <button onclick="appendToDisplay('8')">8</button>
        <button onclick="appendToDisplay('9')">9</button>
        <button onclick="appendToDisplay('/')">/</button>
    </div>
    <div class="row">
        <button onclick="appendToDisplay('4')">4</button>
        <button onclick="appendToDisplay('5')">5</button>
        <button onclick="appendToDisplay('6')">6</button>
        <button onclick="appendToDisplay('*')">*</button>
    </div>
    <div class="row">
        <button onclick="appendToDisplay('1')">1</button>
        <button onclick="appendToDisplay('2')">2</button>
        <button onclick="appendToDisplay('3')">3</button>
        <button onclick="appendToDisplay('-')">-</button>
    </div>
    <div class="row">
        <button onclick="appendToDisplay('0')">0</button>
        <button onclick="appendToDisplay('.')">.</button>
        <button onclick="calculateResult()">=</button>
        <button onclick="appendToDisplay('+')">+</button>
    </div>
    <div class="row">
        <button onclick="clearDisplay()">C</button>
    </div>
</div>

<script>
    function appendToDisplay(value) {
        document.getElementById("display").value += value;
    }

    function clearDisplay() {
        document.getElementById("display").value = "";
    }

    function calculateResult() {
        const display = document.getElementById("display");
        try {
            const result = eval(display.value);
            display.value = result;
        } catch (error) {
            display.value = "Error";
        }
    }
</script>

</body>
</html>