It is 3 hour and 36 minutes.
216 hours = 9 days
216 hours is 9 days @24 hours per day.
216 hours / 24 hours per day = 9 days
0 hours are in 20 min an hour is 60 min
610 min / 60 = 10.167 hours.
8 hours, 20 minutes
216
2 hours
5 hours, 50 minutes
28.8
3 hours and 36 minutes.
320 min = 51/3 hours = 5hours 20minutes