To find out how many miles you drive each day, you can simply divide the total number of miles driven by the number of days:
Total miles driven = 1400 miles
Total number of days = 3.5 days
Now, divide the total miles by the number of days:
Miles driven each day = Total miles / Total days
Miles driven each day = 1400 miles / 3.5 days
Miles driven each day = 400 miles
So, you drive 400 miles each day.