1 hour = 60 minutes so 816 hours = 816*60 minutes. Now use a calculator.
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About 12 hours and 33 minutes at an average of 65 mph
ANSWER:2 hours, 15 minutes. 180 minutes (Which is 3 hours)
7 hours, 44 minutes.
The answer is 2 hours and 2 minutes
14 hours and a few minutes