Consider "A" is 8 litre jar, "B" is 5 litre jar & "C" is a 3 liter jar. And now A is full of 8 litre of milk.

From A pour 5 litre milk in B, and again from B pour 3 litre milk in C.
Now, A = 3 Ltr, B = 2 Ltr , And C = 3 Ltr

Again, from the C, put back 3 litre milk in the A. Now it will be like A=6 Ltr , B=2 Ltr & C=0 Ltr.
And from B pour 2 litre of milk in C. So it will make A=6 Ltr, B=0 Ltr, C=2 Ltr

From A pour 5 Ltr milk in B, and now A will have 1 Ltr milk left.
A=1, B=5, C=2

From B pour 1 Ltr in C (as C already had 2 Ltr so it will take only 1 Ltr). And B will have 4 Ltr milk left.
A=1, B=4, C=3

From C pour 3 Ltr of milk in A, now A will have (1 3) 4 Ltr milk & B will have 4 Ltr of milk.


For better understanding try this:
A=8, B=0, C=0
A=3, B=5, C=0
A=3, B=2, C=3
A=6, B=0, C=2
A=1, B=5, C=2
A=1, B=4, C=3
A=4, B=4, C=0