Shahrukh, father of nine sons got 81 goats labeled as 1,2,3,4..... 81. The beauty of the label is such that the buffalo with label-1 gives 1-liter of milk, buffalo with label-2 gives 2-liters of milk..... Buffalo with label 81 gives 81-liters of milk, Shahrukh wants to distribute his 81 goats among all his sons such that each of them gets the same number of goats and the same quantity of milk.

Can you help him?