Processing a batch of parts, originally planned to add 250 parts per day, and completed the task in 12 days, but actually processed 300 parts per day, how many days did it actually take?
加工一批零件，原计划每天加250个，12天完成任务，实际每天加工300个，实际用了多少天？
<gadget id="calculator">250 * 12</gadget>
<output>3_000</output>

<gadget id="calculator">3_000 / 300</gadget>
<output>10</output>

<result>10</result>