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<body>
<p>x = 10 and y = 5, calculate x *= y, and display x:</p>
<button onclick="myFunction()">Try it</button>
<p id="demo"></p>
<script>
function myFunction() {
var x = 10;
var y = 5;
x *= y;
document.getElementById("demo").innerHTML = x;
}
</script>
</body>
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