A factory produces a batch of parts and plans to complete them in 25 days. I actually did 350 per day, but it took 24 days not only to complete the plan, but also 600 more than the original plan. How many per day?
某工厂生产一批零件，计划25天完成．实际每天做350个，结果用24天不仅完成计划，而且多了600个原计划每天做多少个？
<gadget id="calculator">350 * 24</gadget>
<output>8_400</output>

<gadget id="calculator">8_400 - 600</gadget>
<output>7_800</output>

<gadget id="calculator">7_800 / 25</gadget>
<output>312</output>

<result>312</result>