First find the total number of miles Jenna drives: 400 miles/way * 2 ways = 800 miles

Then multiply that number by her pay per mile to find her total pay: 800 miles * $0.40/mile = $<<800*0.4=320>>320

# Answer

320
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Jenna works as a truck driver. She gets paid $0.40 cents per mile. If she drives 400 miles one way, how much does she get paid for a round trip?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
320
Jenna works as a truck driver. She gets paid $0.40 cents per mile. If she drives 400 miles one way, how much does she get paid for a round trip?
train