Farmer Stone is quite an eccentric dairy farmer.
He originally had a total 54 gallons of milk in three churns and he wanted to make sure each churn contained 18 gallons of milk.
In order to do this, he did the following:
First he poured 1/4 of the first churn in the second churn.
He then poured 1/2 of the second churn into the third churn.
Finally he poured 1/3 of the third churn into the first churn.
How many gallons did each churn contain before Farmer Stone started pouring?