Edit in JSFiddle

<!DOCTYPE html>
<html>
<head>
<title>HTML’de Div Kullanımı</title>
</head>
<body>
<div style="width:150px;background-color:#ccc;padding:5px;">Bu dış div
<div style="width:100px;background-color:red;padding:3px;">İç içe Div</div>
</div>
</body>
</html>