A rectangular pool with a length of 50m and a width of 30m and a depth of 1.2m in the pool. How many hours will it take to drain 2.5m3 per minute if water is pumped outward?
一个长方形水池，长50m，宽30m，池内水深1.2m．如果用水泵向外排水，每分钟排2.5m3，需要多少小时排完？
<gadget id="calculator">1.2 / 2.5 / 60</gadget>
<output>0.008</output>

<gadget id="calculator">50 * 30 * 0.008</gadget>
<output>12</output>

<result>12</result>