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<html lang="en">
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    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <link rel="stylesheet" href="style.css">
    <title>Black Hole Number Calculator</title>
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<body>
    <div class="header">
        <div class="title">BLACKHOLE NUMBER CALCULATOR</div>
    </div>
    <div class="container">
        <div class="square">
            <p style="font-family: Verdana, Geneva, Tahoma, sans-serif; color:darkblue;">Any number you choo