Master He needs to produce 400 parts, and a total of 80 parts were produced in the first 2 days. According to this calculation, how many days will it take to complete the task?
何师傅要生产400个零件，前2天共生产了80个零件，照这样计算，一共需要几天才能完成任务？
<gadget id="calculator">80 / 2</gadget>
<output>40</output>

<gadget id="calculator">400 / 40</gadget>
<output>10</output>

<result>10</result>