###Human: Harry uses a whole bag of chocolate chips when he makes dough for chocolate chip cookies. The dough makes three batches of cookies, and each cookie has nine chocolate chips in it. A bag of chocolate chips has 81 chips in it. How many cookies are in a batch?, ### Assistant: There are 81 / 3= 27 chips in a batch.
Thus, there are 27 / 9 = 3 cookies in a batch. 
 So the answer is :  3