<!DOCTYPE html>
<style>
.container {
color: black;
font: 20vw/1 Ahem;
}
.float {
width: 20vw;
height: 40vw;
float: left;
background-color: grey;
</style>
<body>
<div class="container">
<div class="float"></div>
X<br/>
X
</div>
</body>