Master Wang needs to process 1,200 parts, 60 parts per day. It is known that it takes 4 days to process, and the rest will process 80 parts per day. How many days will it take to complete the task?
王师傅要加工1200个零件，每天加工60个，已知加工了4天，剩下的每天加工80个，还要多少天完成任务？
<gadget id="calculator">60 * 4</gadget>
<output>240</output>

<gadget id="calculator">1_200 - 240</gadget>
<output>960</output>

<gadget id="calculator">960 / 80</gadget>
<output>12</output>

<result>12</result>