A factory produces 4,500 parts, and plans to make 300 parts per day, which is 75 fewer than the actual number. How many days does it actually take to complete the task?
某工厂生产4500个零件，计划每天做300个，比实际少做75个，完成任务实际需多少天？
<gadget id="calculator">300 + 75</gadget>
<output>375</output>

<gadget id="calculator">4_500 / 375</gadget>
<output>12</output>

<result>12</result>