Respuesta :

1 pie for every 3 cleanings

 you cleaned 9 times

 so 9/3 = 3

 she owes you 3 pies

lol...that sounds like a pretty good deal

every 3 times u clean, u get an apple pie....u have cleaned 9 times...
9/3 = 3 apple pies <==

or this way...
3 times = 1 pie
3 times = 1 pie
3 times = 1 pie
--------------------add
9 times = 3 pies