<!DOCTYPE html>
<html>
<style>
div { border: 1px solid green;}
</style>
<body>
<div style="width: 600px; height: 600px;">
<div style="float: right; width: 120px; height: 30px;"></div>
<div style="float: right; width: 320px; height: 50px;"></div>
<div style="width: 300px; height: 100px;">foobar foobar foobar foobar foobar foobar foobar<div style="float: right; width: 200px; height: 20px;"></div></div>
</div>
</body>
</html>