<!DOCTYPE html>
<html>
<head>
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<title>W3Cschool教程(w3cschool.cn)</title>
</head>
<body>
<p id="demo"></p>
<script>
var myFunction = function (a, b) {return a * b}
document.getElementById("demo").innerHTML = myFunction(4, 3);
</script>
</body>
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