Take out a bottle first, give it to 1 when it comes out, give it to No.2 when it comes out, and give the remaining No.2 to No.3,

Take out another bottle and pour the wine into the first bottle. It costs four taels. At this time, from the eyes, two bottles of wine are as many as four taels. Give it to number 4 and share the rest of the wine equally. One is two taels, then one of them is given to No.3, and the remaining two taels are divided equally. No.2 and 1 will do.