A tank of water uses (1/3) 4 liters less in the morning, and uses the remaining (1/4) 4 liters more in the afternoon. What is the difference between the used and the remaining liters?
一缸水上午用了(1/3)少4升，下午用去余下的(1/4)多4升，则用去的与剩下的相差多少升．
<result>2</result>