1 mar =3 prune
=> 2 mere = 3 +3 = 6 prune
=> 3 mere= 3+3+3=9 prune
=> 4 mere= 3+3+3+3=12 prune
=> 5 mere= 3+3+3+3+3=15 prune
=> 6 mere= 3+3+3+3+3+3=18 prune
6 prune= o portocala
6+6=12 prune = 2 portocale
6+6+6 =18 prune=3 portocale
3 portocale =18 prune = 6 mere