Li Ning Garment Factory plans to make 670 sets of sweatshirts. It has been doing it for 5 days, with an average of 80 sets per day. The rest will be finished in 3 days, how many sets should be done on average per day?
李宁服装厂计划做670套运动衫，已经做了5天，平均每天做80套．剩下的要3天做完，平均每天应做多少套？
<gadget id="calculator">80 * 5</gadget>
<output>400</output>

<gadget id="calculator">670 - 400</gadget>
<output>270</output>

<gadget id="calculator">270 / 3</gadget>
<output>90</output>

<result>90</result>