<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
<style>
.same {
width: 200px;
height: 200px;
}
.left {
background-color: yellow;
float: left;
}
.right {
background-color: red;
float: right;
}
.top {
background-color: blue;
height: 200px;
}
</style>
</head>
<body>
<div class="top">1</div>
<div class="left same"></div>
<div class="right same"></div>
</body>
</html>
