When multiplying two numbers, if one factor is multiplied by 5 and the other factor is reduced by 10, what is the product?
两个数相乘，如果一个因数扩大5倍，另一个因数缩小10倍，积多少．
<gadget id="calculator">10 / 5</gadget>
<output>2</output>

<result>2</result>