A coal mine uses 6 shearers to mine 1440 tons of coal in 8 hours. On average, how many tons of coal is mined by each shearer per hour?
一个煤矿用6台采煤机8小时采煤1440吨．平均每台采煤机每小时采煤多少吨？
<gadget id="calculator">1_440 / 8 / 6</gadget>
<output>30</output>

<result>30</result>