A garment factory plans to make 660 sets of clothes. It has been done for 3 days, 75 sets are made every day, and the remaining 5 days are finished. How many sets are made per day on average?
某服装厂计划做660套衣服，已经做了3天，每天做75套，剩下的5天做完，平均每天做多少套？
<gadget id="calculator">3 * 75</gadget>
<output>225</output>

<gadget id="calculator">660 - 225</gadget>
<output>435</output>

<gadget id="calculator">435 / 5</gadget>
<output>87</output>

<result>87</result>