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Test Info:

<!DOCTYPE html>
<html class="multicol">
<head>
<meta charset="UTF-8">
<style>
.multicol { width: 300px; column-width: 100px; height: 100px; }
.R { float:right; }
.L { float: left; }
.clear { clear: left; }
</style>
</head>
<body><div class="L" style="height: 250px;"></div><div class="clear"></div><div style="margin-bottom: 1em;"></div><div class="L" style="height: 250px;"></div><div><div class="clear"><div class="R"></div></div></div></body>
</html>