The machinery factory manufactures a batch of parts. The original plan is to produce 250 parts per day, and it takes 12 days to complete. The actual number of parts produced per day is 1.5 times the original number. How many days did it actually take to complete this batch of parts?
机械厂制造一批零件，原计划每天生产250个，12天完成．实际每天生产的个数是原来的1.5倍，完成这批零件实际用了多少天？
<gadget id="calculator">250 * 1.5</gadget>
<output>375</output>

<gadget id="calculator">12 / 375</gadget>
<output>4/125 = around 0.032</output>

<gadget id="calculator">250 * (4/125)</gadget>
<output>8</output>

<result>8</result>