A job is done by 15 people and can be completed in 8 days. According to this calculation, if 12 people do it, how many days can it be completed.
一个工作由15人去做，8天可以完成．照这样计算，如果由12人去做，多少天可以完成．
<gadget id="calculator">15 * 8</gadget>
<output>120</output>

<gadget id="calculator">120 / 12</gadget>
<output>10</output>

<result>10</result>