there were 4 girls, A, B, C, D. they decided to divide any of the gift in 4 equal parts. So when uncle of A, bring some cookies for A, she divided them in four equal parts. Then she decided to eat her share, as she was hungry that time. Just after that, B arrives, then she divided the remaining cookies in four equal parts. Then A, B decided to eat their shares, By keeping C and Ds share. After that c arrives n divided that remaining share, again into four parts and eaten their respective shares. Finally wen D arrives, n divided it into four parts and d gets 3 cookies.
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