When multiplying two numbers, if one factor is increased by 6, the product will be increased by 48; if the other factor is subtracted by 4, the product will be decreased by 60. What is the product of the two factors.
两个数相乘，如果一个因数增加6，积就增加48；如果另一个因数减数4，积就减少60．原来两个因数的积是多少．
<gadget id="calculator">15 * 8</gadget>
<output>120</output>

<result>120</result>