.clearfix:after {
	clear:both;
	display:table;
	content:'';
}


#body {
	margin:0 auto;
	width: 958px;
}

#head>div{
	border: 1px lightgray solid;
	height: 100px;
	float:left;
}

#head>div:first-child{
	width: 230px;
	margin-right:10px;
}
#head>div:last-child{
	width: 714px;
}


#contents>div{
	border: 1px lightgray solid;
	height: 200px;
	width: 311px;
	float:left;
	margin-top:10px;
	margin-right:9px;
}
#contents>div:last-child{
	margin-right:0px;
}
	
#foot{
	margin-top:10px;
	border: 1px lightgray solid;
	height: 50px;
}