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3 x 2 3

Source Code:

    <math> 
      <mrow> 
        <mroot> 
          <mn>3</mn> 
          <mi>x</mi> 
          <mn>2</mn> 
        </mroot> 
        <mroot> 
          <mn>3</mn> 
        </mroot> 
      </mrow> 
    </math>