A factory needs to make 3,000 coats, and 600 coats are made in 3 days. How many days will it take to make the rest?
一个工厂要制作3000件上衣，3天制作了600件，剩余的还需要制作多少天．
<gadget id="calculator">3_000 - 600</gadget>
<output>2_400</output>

<gadget id="calculator">600 / 3</gadget>
<output>200</output>

<gadget id="calculator">2_400 / 200</gadget>
<output>12</output>

<result>12</result>