First, figure out how many additional miles Jackson is running after four weeks: 4 weeks * 1 extra mile/week = <<4*1=4>>4 extra miles

Then add the 4 extra miles to the 3 miles he initially ran: 4 miles + 3 miles = <<4+3=7>>7 miles

# Answer

7
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Jackson wants to improve his endurance running. His goal is to start by running 3 miles a day the first week, then spend the next four weeks running one additional mile/day each week. How many miles is Jackson running each day at the end of this exercise program?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
7
Jackson wants to improve his endurance running. His goal is to start by running 3 miles a day the first week, then spend the next four weeks running one additional mile/day each week. How many miles is Jackson running each day at the end of this exercise program?
train