Mine

<html>

	<head>
		<style type="text/css">
			.force
			{
				padding: 0px;
			 	width: 600px;
				margin-left: auto; 
				margin-right: auto;
			}

			.1
			{
				float: left;
			 	width: 400px;
				background-color: #CCCCCC;
			}

			.2
			{
				float: right;
			 	width: 300px;
				background-color: #000000;
			}
		</style>
	</head>


	<body>
		<div class='force'>
			<div class='1'>derwermwerwerwerwerwerwerwerwerwerwe</div>
			<div class='2'>part2</div>
		</div>
	</body>

</html>