Hongguang Shoes Factory produced 2,790 pairs of men's leather shoes in the first quarter of this year, how many pairs are produced on average per day.
红光鞋厂今年第一季度生产男装皮鞋2790双，平均每天生产多少双．
<gadget id="calculator">31 + 28 + 31</gadget>
<output>90</output>

<gadget id="calculator">2_790 / 90</gadget>
<output>31</output>

<result>31</result>