He has a 14-hour trip and wants to stop every 2 hours so that's 14/2 = <<14/2=7>>7 pit stops

He will make 7 pit stops plus 2 more for food and 3 more for gas for a total of 7+2+3 = <<7+2+3=12>>12 pit stops

Each pit stop will take 20 minutes and he is making 12 stops so that's 20*12 = <<20*12=240>>240 minutes

60 minutes are in an hour and he's adding 240 minutes to his trip so that's 240/60 = <<240/60=4>>4 more hours

His trip started as 14 hours and he will add an additional 4 hours in pit stops for a total of a 14+4 = <<14+4=18>>18 hour long trip

# Answer

18
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Carter has a 14-hour road trip.  He wants to stop every 2 hours to stretch his legs.  He also wants to make 2 additional stops for food and 3 additional stops for gas.  If each pit stop takes 20 minutes, how many hours will his road trip become?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
18
Carter has a 14-hour road trip.  He wants to stop every 2 hours to stretch his legs.  He also wants to make 2 additional stops for food and 3 additional stops for gas.  If each pit stop takes 20 minutes, how many hours will his road trip become?
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