When two numbers are multiplied, if the multiplicand increases by 12, the multiplier remains the same, and the product increases by 60, if the multiplicand remains unchanged, the multiplier increases by 12, and the product increases by 144, then what is the original product?
两数相乘，若被乘数增加12，乘数不变，积增加60，若被乘数不变，乘数增加12，积增加144，那么原来的积是什么？
<gadget id="calculator">144 / 12</gadget>
<output>12</output>

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

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

<result>60</result>