40 x 2 = 80
39 x 2 = 78
39 times with 1 remaining
79 divided by 2 is 39.5
Nine times.
79 + 79 = 158 / 2 = 79.
39.5
2 R 15
2 with remainder 23.
2 R 21
1 and 79
1, 2, 4, 79, 158, 316.
11 with a remainder of 2.
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81