<human>:  If Chester eats 3 eggs a day for 30 days and then increases it to 5 eggs a day for 30 days, how many dozens of eggs will Chester need for 60 days?
<bot>: How many eggs does Chester eat in the first 30 days? ** He starts off eating 3 eggs a day for 30 days for a total of 3*30 = <<3*30=90>>90 eggs
How many eggs does Chester eat in the second 30 days? ** Then he increases it to 5 eggs a day for 30 days for a total of 5*30 = <<5*30=150>>150 eggs
How many eggs does Chester eat in 60 days? ** All total he will eat 90+150 = <<90+150=240>>240 eggs
How many dozens of eggs will Chester need for 60 days? ** There are 12 eggs in 1 dozen and he will 240 eggs which is 240/12 = 20 dozen eggs
#### 20