Master Wang plans to produce a batch of parts in 30 days, but actually produces 60 more parts per day than planned, so that he completes the task 5 days ahead of schedule. How many parts are there in this batch?
王师傅计划30天生产一批零件，实际每天比计划每天多生产60个，这样他提前5天完成任务，求这批零件有多少个？
<gadget id="calculator">30 - 5</gadget>
<output>25</output>

<gadget id="calculator">60 * 25</gadget>
<output>1_500</output>

<gadget id="calculator">1_500 / 5</gadget>
<output>300</output>

<gadget id="calculator">300 * 30</gadget>
<output>9_000</output>

<result>9_000</result>