The product of multiplying two numbers is 80. If one of the factors is multiplied by 5 and the other factor is multiplied by 2, what is the product?
两个数相乘的积是80，如果其中的一个因数扩大5倍，另一个因数扩大2倍，积是多少．
<gadget id="calculator">5 * 2</gadget>
<output>10</output>

<gadget id="calculator">80 * 10</gadget>
<output>800</output>

<result>800</result>