<human>:  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?
<bot>: How many hamburgers did last year's winner eat? ** Last year's winner ate 21 hamburgers because 84 / 4 = <<84/4=21>>21
How many hamburgers does she need to eat? ** She needs to eat 22 hamburgers because 21 + 1 = <<21+1=22>>22
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