There are 10 liters of pure alcohol in barrel A, a mixture of 6 liters of pure alcohol and 8 liters of water in barrel B, and 10 liters of water in barrel C. Now pour a certain amount of alcohol from barrel A into barrel B and stir evenly; then pour a certain amount of liquid from barrel B to barrel C, and stir evenly; then pour a certain amount of liquid from barrel C to barrel A, and finally the alcohol concentrations in each barrel are: barrel A 75%, barrel B 50% of the barrel and 25% of the C barrel, then how many liters of the mixed liquid is in the C barrel at this time.
甲桶中装有10升纯酒精，乙桶中装有6升纯酒精与8升水的混合物，丙桶中装有10升水，现在先从甲桶向乙桶倒入一定量的酒精，并搅拌均匀；然后从乙桶向丙桶倒入一定量的液体，并搅拌均匀；接着从丙桶向甲桶倒入一定是的液体，最后各桶中的酒精浓度分别为：甲桶75%，乙桶50%，丙桶25%，那么此时丙桶中有混合液体多少升．
<gadget id="calculator">10 - 8 - 6</gadget>
<output>-4</output>

<gadget id="calculator">25 / 100</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">(-4) / (-4) / (1/4)</gadget>
<output>4</output>

<gadget id="calculator">10 - 4</gadget>
<output>6</output>

<gadget id="calculator">10 + 6</gadget>
<output>16</output>

<result>16</result>