Each box contains 4*2=<<4*2=8>>8 crayons.

In an hour, they make 8*5=<<8*5=40>>40 crayons.

In 4 hours they make 4*40=<<4*40=160>>160 crayons.

# Answer

160
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
A crayon factory makes 4 colors of crayons. They put 2 of each color crayon in each box. The factory produces enough crayons to fill 5 boxes per hour. How many crayons does the factory produce in 4 hours?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
160
A crayon factory makes 4 colors of crayons. They put 2 of each color crayon in each box. The factory produces enough crayons to fill 5 boxes per hour. How many crayons does the factory produce in 4 hours?
train