It took 12 days to process 3000 sets of clothes, with an average of 180 sets per day. The remaining tasks will take 4 days to complete, how many sets should be processed on average per day?
要加工3000套衣服，已经加工了12天，平均每天加工180套．剩下的任务要4天完成，平均每天要加工多少套？
<gadget id="calculator">180 * 12</gadget>
<output>2_160</output>

<gadget id="calculator">3_000 - 2_160</gadget>
<output>840</output>

<gadget id="calculator">840 / 4</gadget>
<output>210</output>

<result>210</result>