639 divided by 3 = 213 So 213 x 3 = 639
40896
71
1917
639
639 miles divided by 65 miles per hour is about ten hours, slightly less.
639 x 2
639 = 1 x 639, 3 x 213, 9 x 71, 71 x 9, 213 x 3, 639 x 1.
213
91 with a remainder of 2
7 with remainder 72.
343000