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

### Instruction:
Tonya is in a hamburger eating contest. Each hamburger is 4 ounces. Last year the winner ate 84 ounces. How many hamburgers does she have to eat to beat last year's winner?

### Response:
Last year's winner ate 21 hamburgers because 84 / 4 = <<84/4=21>>21
She needs to eat 22 hamburgers because 21 + 1 = 22
#### 22