Two identical bottles are filled with alcohol solution, the volume ratio of alcohol to water in bottle A is 3:1, and the volume ratio of alcohol to water in bottle B is 7:3. Now mix the two bottles of alcohol solution, knowing that there are 4.4 liters of water in the mixed solution, how many liters of alcohol is there in the mixed solution.
两个同样的瓶子里装满酒精溶液，甲瓶中酒精与水的容积比是3：1，乙瓶中酒精与水的容积比是7：3．现在把两瓶酒精溶液混合起来，知道混合溶液中的水有4.4升，则混合溶液中的酒精有多少升．
<gadget id="calculator">4.4 / 11</gadget>
<output>0.4</output>

<gadget id="calculator">0.4 * 29</gadget>
<output>11.6</output>

<result>11.6</result>