Well thats a simple one Milan. You have 72 cigarette butts.You know it takes 6 butts to make a ciggarette. Simply divide the 72 butts by the 6 butts it takes to make the the ciggarette. 72/6= 12
BUT WAIT.
After he has smoked those 12 cigarettes, he can still make another 2 cigarettes from the 12 remaining butts. Making the answer 14!
:)))