There are 80*5 = <<80*5=400>>400 engines in total.

400/4 = <<400/4=100>>100 of the engines are defective.

400-100 = <<400-100=300>>300 of the engines are not defective.

# Answer

300
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
If one fourth of the engines are defective, and there are 5 batches of 80 engines each. How many engines are not defective?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
300
If one fourth of the engines are defective, and there are 5 batches of 80 engines each. How many engines are not defective?
train