it depends on how many miles you can drive a day
Zero.
If you work five days a week, you will drive 235 miles a week.
700 miles or 11 hrs
225
It is about 3667 miles. If you drive 600 miles a day it will take you about 6.1 days to drive
Aprox 3780 miles
173
Per diem (Latin for day) is a payment for a day - not related to time or distance. It is usually a fixed amount "per day". So if you drive 50 miles or 500 miles you'll get the same amount.
it isn't miles it is hours that the airforce goes by. you can only drive 8
They will drive an AVERAGE of 865/5 = 173 miles each day. But I suspect that, on day 1, they will not stop at exactly 173 miles and spend the night on the roadside if the nearest hotel/motel is 170 or 180 miles!
Any number you like. The fewer miles per day that you drive, the longer it will take you but the question does not set any time limit.