###Human: John buys 3 boxes of burritos.  He gives away a 3rd of them to his friend.  Each box has 20 burritos.  He eats 3 burritos per day for 10 days.  How many burritos does he have left?, ### Assistant: He gave 3/3=1 box away
So he has 3-1=2 boxes
So he got 2*20=40 burritos
He ate 3*10=30 burritos
So he has 40-30=10 burritos left 
 So the answer is :  10