<!DOCTYPE html>
<html>
<head>
<style type='text/css'>
ol li {
list-style-type: decimal;
border-bottom: 1px solid #000;
padding-left: 20px;
margin-left: 20px;
}
ol {
list-style-position: inside;
}
</style>
</head>
<body>
<ol>
<li>One</li>
<li>Two</li>
<li>Three</li>
</ol>
</body>
</html>