If one factor is enlarged by 20 times, the other factor will also be enlarged by 20 times, how many times the product will be enlarged.
一个因数扩大20倍，另一个因数也扩大20倍，积扩大多少倍倍．
<gadget id="calculator">20 * 20</gadget>
<output>400</output>

<result>400</result>