<!DOCTYPE html>
<html>

  <head>
    <link rel="stylesheet" href="style.css">
    <script src="script.js"></script>
  </head>

  <body>
    <table border=1>
      <tr>
        <td>some content</td>
        <td>some more content</td>
        <td rowspan="2">THIS is A COLUMN</td>
      </tr>
      <tr>
        <td colspan="2">SINGLE CELL ROW</td>
      </tr>
    </table>
    
    <div>
      <div>
        <div>
          <div>some content</div>
          <div>some more content</div>
        </div>
        <div>THIS is A COLUMN</div>
      </div>
      <div>SINGLE CELL ROW</div>
    </div>
  </body>
  <style>
    body div { border: 1px solid #999; margin: 0; }
    body > div { display: flex; flex-flow: row nowrap; margin-top: 10px; }
    body > div > div { display: flex; flex-flow: column nowrap; flex: 1 1 0; }
    body > div > div > div { display: flex; flex-flow: row nowrap; flex: 1 1 1;}
    body > div > div > div > div { flex: 1 1 0; }
  </style>
</html>
// Code goes here

/* Styles go here */