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

* {
	text-align: center;
}

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

#a, #b, #c {
	margin-top: 10px;
}

#a>div {
	font-size: 20px;
	border: 1px lightgray solid;
	height: 50px;
	width: 472px;
	float: left;
	margin-right: 10px;
}

#a>div:last-child {
	margin-right: 0;
}

#b>div {
	border: 1px lightgray solid;
	height: 60px;
	float: left;
	margin-right: 10px;
}

#b>div:last-child {
	margin-right: 0;
}

#b1 {
	width: 201px;
}

#b2 {
	width: 530px;
}

#b3 {
	width: 201px;
}

#c {
	border: 1px lightgray solid;
	height: 30px;
}