A cuboid pool is 8.5 meters long, 4 meters wide, and 2 meters deep. If 8 cubic meters can be filled per hour, how many hours will it take to fill the pool?
一个长方体的水池，长8.5米，宽4米，深2米，如果每小时可以放进8立方米，要放满这一池水需要多少小时？
<gadget id="calculator">2 / 8</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">8.5 * 4 * (1/4)</gadget>
<output>8.5</output>

<result>8.5</result>