Below is an instruction that describes a task. Write a response that appropriately completes the request in English. Please answer in English.

### Instruction:
John buys 2 dozen cookies.  He eats 3.  How many cookies does he have left?

### Response:
He got 2*12=<<2*12=24>>24 cookies
So he has 24-3=<<24-3=21>>21 cookies left
#### 21