The product of 640*50 is how many times of 64*5.
640*50的积是64*5的多少倍．
<gadget id="calculator">640 * 50</gadget>
<output>32_000</output>

<gadget id="calculator">64 * 5</gadget>
<output>320</output>

<gadget id="calculator">32_000 / 320</gadget>
<output>100</output>

<result>100</result>