Multiplying two numbers gives 540. If one factor remains the same and the other factor is multiplied by 10 times, what is the product?
两个数相乘得540，如果一个因数不变，另一个因数扩大到原来的10倍，这时积是多少
<gadget id="calculator">540 * 10</gadget>
<output>5_400</output>

<result>5_400</result>