pile of coal is 480 tons, and a truck transports 80 tons in 5 hours. At this speed, how many hours will it take to transport the pile of coal.
一堆煤480吨，一辆卡车5小时运走80吨，照这个速度，还需要多少小时才能把这堆煤运完．
<gadget id="calculator">480 - 80</gadget>
<output>400</output>

<gadget id="calculator">80 / 5</gadget>
<output>16</output>

<gadget id="calculator">400 / 16</gadget>
<output>25</output>

<result>25</result>