16.56 / 6.9 = 2.4
There are 24 hours in one day. Therefore, 1656 hours is equal to 1656/24 = 69 days.
There are 24 hours in 1 day so in 69 days there are 24 * 69 = 1656 hours
12.9684
69 divided into 664 = 0.10391566265060241
34.5
29
69
120
13.8
1.4493
69
23