Both pools A and B are cuboids with a length of 3 meters, a width of 2 meters, and a depth of 1.2 meters. Valve No. 1 is used to inject water into pool A, and the waterless pool A can be filled in 18 minutes; valve No. 2 is used to discharge water from pool A to pool B, and the full water in pool A can be put into pool B in 24 minutes. If the No. 1 and No. 2 valves are opened at the same time, when the water depth of the A pool is 0.4 meters, how many cubic meters of water is there in the B pool?
水池A和B同为长3米，宽2米，深1.2米的长方体．1号阀门用来向A池注水，18分钟可将无水的A池注满；2号阀门用来从A池向B池放水，24分钟可将A池中满池水放入B池．若同时打开1号和2号阀门，那么当A池水深0.4米时，B池有多少立方米的水．
<gadget id="calculator">3 * 2 * 1.2</gadget>
<output>7.2</output>

<result>7.2</result>