3 vehicles transported coal at the same time, transported a total of 120 tons in 2 days, how many tons per vehicle per day on average.
3辆汽车同时运煤，2天共运了120吨，平均每辆车每天运多少吨．
<gadget id="calculator">120 / 2 / 3</gadget>
<output>20</output>

<result>20</result>