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<!DOCTYPE html>
<meta charset="utf-8">
<title>CSS Reference</title>
<style>
div {
float: left;
width: 75px;
height: 50px;
}
#green {
background: green;
}
#black {
background: black;
}
</style>
<p>Test passes if the green and the black rectangle have the same width.</p>
<div id="green"></div>
<div id="black"></div>