A factory plans to produce 3600 parts, but 2400 parts have been produced in the first 6 days. According to this calculation, how many days will it take to complete all the work?
某工厂计划生产3600个零件，前6天已经生产了2400个．照这样计算，全部完成一共需要多少天？
<gadget id="calculator">2_400 / 6</gadget>
<output>400</output>

<gadget id="calculator">3_600 / 400</gadget>
<output>9</output>

<result>9</result>