40*30 If 40 is reduced (1/10), how many times should 30 be expanded to keep the product unchanged?
40*30如果把40缩小(1/10)，要使积不变，则30应扩大到它的多少倍
<gadget id="calculator">10 / 1</gadget>
<output>10</output>

<result>10</result>