<!DOCTYPE html>
<html>
<head>
<title>Title of the document</title>
<style>
.circle {
width: 120px;
line-height: 120px;
border-radius: 50%;
text-align: center;
font-size: 32px;
border: 3px solid #000;
}
</style>
</head>
<body>
<div class="circle">1</div>
<div class="circle">100</div>
<div class="circle">10000</div>
<div class="circle">1000000</div>
</body>
</html>