<!DOCTYPE html>

  <meta charset="UTF-8">

  <title>CSS Reftest Reference</title>

  <link rel="author" title="Gérard Talbot" href="http://www.gtalbot.org/BrowserBugsSection/css21testsuite/">

  <style>
  div
    {
      border: orange solid 4px;
      font-size: 20px;
      height: 234px;
      line-height: 1.3; /* computes to 26px */
      margin-bottom: 1em;
      padding: 0.5em; /* computes to 10px */
      width: 460px;

      columns: 4 auto;

      column-fill: auto;

      column-gap: 1em; /* computes to 20px */

      column-rule: blue solid 4px;

      orphans: 1;
      widows: 1;
    }
  </style>

  <p>Test passes if the digits inside both orange-bordered rectangles are <strong>distributed identically</strong>.

  <div>1<br>2<br>3<br>4<br>5<br>6<br>7<br><br><br>8<br>9<br>0</div>

  <div>1<br>2<br>3<br>4<br>5<br>6<br>7<br><br><br>8<br>9<br>0</div>