A factory needs to process 960 auto parts. It has been processed for 7 days, and there are still 540 parts left unfinished. According to this process, how many days will it take to complete the task?
某工厂要加工960个汽车零件，已经加工7天，还剩下540个零件没有完成，照这样的进程，再过几天能完成任务？
<gadget id="calculator">960 - 540</gadget>
<output>420</output>

<gadget id="calculator">420 / 7</gadget>
<output>60</output>

<gadget id="calculator">540 / 60</gadget>
<output>9</output>

<result>9</result>