A swimming pool is 40 meters long and 20 meters wide, how many cubic meters of water needs to be filled to raise the pool water by 0.3 meters.
一个游泳池长40米、宽20米，需注水多少立方米，池水才能上升0.3米．
<gadget id="calculator">40 * 20 * 0.3</gadget>
<output>240</output>

<result>240</result>