When two factors are multiplied, if a factor is added with a 0, the product is 5200, what is the product of the original two numbers?
两个因数相乘，如果把一个因数添上一个0后，积是5200，原来两个数的积是多少．
<gadget id="calculator">5_200 / 10</gadget>
<output>520</output>

<result>520</result>