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

### 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:
 Mshindi wa mwaka jana alikula hamburger 21 kwa sababu 84 / 4 = <<84/4=21>>21
Anahitaji kula hamburger 22 kwa sababu 21 + 1 = 22