<!DOCTYPE html>
<html lang="en-us">
<head>
<style>
.city {
float: left;
margin: 10px;
padding: 10px;
width: 300px;
height: 300px;
border: 1px solid black;
}
</style>
</head>
<body>
<h1>Responsive Web Design Demo</h1>
<h2>Resize this responsive page!</h2>
<div class="city">
<h2>London</h2>
<p>London is the capital city of England.</p>
<p>It is the most populous city in the United Kingdom,
with a metropolitan area of over 13 million inhabitants.</p>
</div>
<div class="city">
<h2>Paris</h2>
<p>Paris is the capital of France.</p>
<p>The Paris area is one of the largest population centers in Europe,
with more than 12 million inhabitants.</p>
</div>
<div class="city">
<h2>Tokyo</h2>
<p>Tokyo is the capital of Japan.</p>
<p>It is the center of the Greater Tokyo Area,
and the most populous metropolitan area in the world.</p>
</div>
<div class="city">
<h2>View Source</h2>
<p>View the source code to see how this page was built.</p>
</div>
</body>
</html>