The product of two numbers is 30, if one of the factors is multiplied by 4, and the other factor remains unchanged, what is the product.
两个数的积是30，如果其中一个因数乘4，另一个因数不变，积是多少．
<gadget id="calculator">30 * 4</gadget>
<output>120</output>

<result>120</result>