MathML Multiplication

<math xmlns = "https://www.w3.org/1998/Math/MathML">
   <mstack>
      <msgroup>
         <mn>123</mn>
         <msrow>
            <mo>×</mo>
            <mn>321</mn>
         </msrow>
      </msgroup>
      <msline/>
      
      <msgroup shift = "1">
         <mn>123</mn>
         <mn>246</mn>
         <mn>369</mn>
      </msgroup>
      <msline/>
      <mn>39483</mn>
   </mstack>
</math>