longmultiplication-rtl1

W3C sample WIRIS
14 × 23 42 280 322 
<math xmlns="http://www.w3.org/1998/Math/MathML" display="block">
  <mstack>
    <msgroup>
      <mn>14</mn>
      <msrow>
        <mo>×</mo>
        <mn>23</mn>
      </msrow>
    </msgroup>
    <msline/>
    <msgroup>
      <mn>42</mn>
      <mn>280</mn>
    </msgroup>
    <msline/>
    <msgroup>
      <mn>322</mn>
    </msgroup>
  </mstack>
</math>

Author: Abdelshafi Bekhit, The book title is 'Precalculus Mathematics' 2nd Edition.