<!DOCTYPE html>
<html>
<head>
    <title>Comments inside calc() allowed - http://wkb.ug/123082</title>
    <style>
        div { height: 50px; background-color: green; font-size: 50px; }
        #t1 { width: calc(50px + 1em) }
        #t2 { width: calc(50px + /* Comment allowed */ 1em) }
        #t3 { width: calc(150px - /* Comment allowed */ 1em) }
        #t4 { width: calc(50px * /* Comment allowed */ 2) }
        #t5 { width: calc(200px / /* Comment allowed */ 2) }
    </style>
</head>
<body>
    <p>You should see a green rectangle below</p>
    <div id="t1"></div>
    <div id="t2"></div>
    <div id="t3"></div>
    <div id="t4"></div>
    <div id="t5"></div>
</body>
</html>