When multiplying two numbers, if you add 3 to the first factor, the product will increase by 48; if you decrease the second factor by 3, the product will also decrease by 120. What is the product of the two numbers.
两个数相乘，如果把第1个因数加上3，积就增加48；如果把第2个因数减少3，积也减少120．原来两个数的积是多少．
<gadget id="calculator">48 / 3</gadget>
<output>16</output>

<gadget id="calculator">120 / 3</gadget>
<output>40</output>

<gadget id="calculator">16 * 40</gadget>
<output>640</output>

<result>640</result>