12 trucks transported a total of 420 tons of coal 7 times, how many tons of coal is transported by each vehicle on average?
12辆货车7次一共运煤420吨，平均每辆汽车每次运煤多少吨？
<gadget id="calculator">420 / 7 / 12</gadget>
<output>5</output>

<result>5</result>