Edit in JSFiddle

	<div class="box1">div</div>
	<div class="box2">div</div>

div { color: white }

.box1 {
    float: left;
    margin-right: 7px;
    padding: 18px;
    background-color: #59b1f6
}

.box2 {
    background-color: #ffb5b4;
    padding: 18px;
    overflow:hidden;
}