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<html>
<body>
<h2>Common JavaScript Mistakes</h2>
<p>All programming languages, including JavaScript, have difficulties with precise floating point values.</p>
<p>To solve the problem, it helps to multiply and divide:</p>
<p id="demo"></p>
<script>
let x = 0.1;
let y = 0.2;
let z = (x * 10 + y *10) / 10;
document.getElementById("demo").innerHTML = z;
</script>
</body>
</html>
