An old farmer died and left

**17 cows**to his three sons. In his will, the farmer stated that his**oldest son**should get**1/2,**his**middle son**should get**1/3,**and his**youngest son**should get**1/9**of all the cows. The sons, who did not want to end up with half cows, sat for days trying to figure out how many cows each of them should get.
One day,
their neighbor came by to see how they were doing after their father's
death. The three sons told him their

**problem.**After thinking for a while, the neighbor said: "I'll be right back!" He went away, and when he came back, the three sons could**divide**the cows according to their**father's will,**and in such a way, that each of them got a**whole**number of cows.