If the first factor is increased by 12 and the second factor remains unchanged, the product increases by 60; if the first factor remains unchanged and the second factor is increased by 12, the product increases by 144. What is the product of multiplying the two factors? ．
如果第一个因数增加12，第二个因数不变，积就增加60；如果第一个因数不变，第二个因数增加12，积就增加144，原来两个因数相乘的积是多少．
<gadget id="calculator">60 / 12</gadget>
<output>5</output>

<gadget id="calculator">144 / 12</gadget>
<output>12</output>

<gadget id="calculator">5 * 12</gadget>
<output>60</output>

<result>60</result>