Answer
Multiples of 1421 are:
1421, 2842, 4263, 5684, 7105, 8526, 9947, 11368, 12789, 14210, 15631, 17052, 18473, 19894, 21315, 22736, 24157, 25578, 26999, 28420, 29841, 31262, 32683, 34104, 35525, 36946, 38367, 39788, 41209, 42630, 44051, 45472, 46893, 48314, 49735, 51156, 52577, 53998, 55419, 56840, 58261, 59682, 61103, 62524, 63945, 65366, 66787, 68208, 69629
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