54 days 144 9 hours. This question is actually very simple. Multiply 54 by 24 to get 1296, and divide 1296 by 9 to get 144. We know that a day is 24 hours, which is the basic concept of time. Then 54 days is 1296 hours, 1296 hours has 144 9 hours. Also know that there are 12 months in a year, 3 1.30.29.28 days in each month, and 365 days in leap year.