div style background-color green width 140px height 400px float left d

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<div style="background-color: green; width: 140px; height:400px; float: left;"></div>
<div style="background-color: blue; width: 500px; height:400px; float: right;"></div>
<div style="background-color: yellow; height:50px; clear:both;"></div>