A workshop produces 800 parts. After receiving the task, 80 parts were produced in 4 days. According to this calculation, how many days will it take to complete the remaining tasks?
某车间生产800个零件，接到任务后，4天就生产了80个，照这样计算，剩下的任务还要几天才能完成？
<gadget id="calculator">800 - 80</gadget>
<output>720</output>

<gadget id="calculator">80 / 4</gadget>
<output>20</output>

<gadget id="calculator">720 / 20</gadget>
<output>36</output>

<result>36</result>