5 construction workers built a total of 620 meters of road in 4 days, how many meters of road was built per person per day on average?
建筑工人5人4天共修路620米，平均每人每天修路多少米？
<gadget id="calculator">620 / 4 / 5</gadget>
<output>31</output>

<result>31</result>