Make this rule double the width of the other by typing width.

<html>
<head>
<link rel="stylesheet" href="style.css">
<style>
.single {
width: 125px;
background-color: RosyBrown;
}

.double {
width: 250px;
background-color: brown;
}
</style>
</head>
<body>
<h1>Easy Coffee Guide</h1>
<p class="single">7g for a single shot</p>
<p class="double">14g for a double shot</p>
</body>
</html>]]>

Make sure to type width.