Master Wu planned to process 4,000 parts, and a total of 1,500 were processed in the first 6 days. According to this calculation, how many days will it take to complete this task?
吴师傅计划加工4000个零件，前6天共加工了1500个，照这样计算，还要多少天才能完成这项任务？
<gadget id="calculator">4_000 - 1_500</gadget>
<output>2_500</output>

<gadget id="calculator">1_500 / 6</gadget>
<output>250</output>

<gadget id="calculator">2_500 / 250</gadget>
<output>10</output>

<result>10</result>