<!DOCTYPE html>
<html>
    <head>
        <title>Change multicol to regular block</title>
    </head>
    <body>
        <p>There should be a blue <em>square</em> below.</p>
        <div id="elm" style="width:16em; line-height:4em; background:blue;">
            <br>
            <br>
            <br>
            <br>
        </div>
    </body>
</html>