Answer
Multiples of 638 are:
638, 1276, 1914, 2552, 3190, 3828, 4466, 5104, 5742, 6380, 7018, 7656, 8294, 8932, 9570, 10208, 10846, 11484, 12122, 12760, 13398, 14036, 14674, 15312, 15950, 16588, 17226, 17864, 18502, 19140, 19778, 20416, 21054, 21692, 22330, 22968, 23606, 24244, 24882, 25520, 26158, 26796, 27434, 28072, 28710, 29348, 29986, 30624, 31262
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