<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>박스 모델 1</title>
<style>
div{
border: 3px dashed gray;
padding: 10px;
margin: 20px;
width: 110px;
height: 35px;
}
span{
width: 100px;
height: 100px;
display: inline-block;
}
</style>
</head>
<body>
<div>요소의 콘텐츠</div>
<span>다른 콘텐츠</span>
</body>
</html>