There are two water inlet pipes A and B in a pool. Open both pipes at the same time for 10 minutes to fill the pool. Now open pipe A for 9 minutes, then open pipe B again, and the pool will be full after 4 minutes. Given that pipe A injects 0.56 cubic meters of water per minute, find the volume of the pool.
一个水池有甲、乙两根进水管，同时打开两管10分钟注满水池．现在打开甲管9分钟后，再接着打开乙管，4分钟后水池注满．已知甲管每分钟注水0.56立方米，求水池的容积．
<gadget id="calculator">1 / 10</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">(1/10) * 4</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1 - (2/5)</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">9 / (3/5)</gadget>
<output>15</output>

<gadget id="calculator">0.56 * 15</gadget>
<output>8.4</output>

<result>8.4</result>