The factory needs to produce 1,500 pieces of one kind of parts. It has been produced for 12 days, and a total of 900 pieces have been produced. According to this calculation, how many days will it take to complete this task?
工厂要生产一种零件1500件，已经生产了12天，共生产900件，照这样计算，还要多少天能完成这项任务？
<gadget id="calculator">1_500 - 900</gadget>
<output>600</output>

<gadget id="calculator">900 / 12</gadget>
<output>75</output>

<gadget id="calculator">600 / 75</gadget>
<output>8</output>

<result>8</result>