The garment factory plans to produce 1311 sets of clothes. It has been done for 5 days, with an average of 75 sets per day. The rest requires 78 sets per day. How many days will it take to complete.
服装厂计划生产1311套衣服，己经做了5天，平均每天做75套，剩下的要求每天做78套，还要多少天才能完成．
<gadget id="calculator">75 * 5</gadget>
<output>375</output>

<gadget id="calculator">1_311 - 375</gadget>
<output>936</output>

<gadget id="calculator">936 / 78</gadget>
<output>12</output>

<result>12</result>