Answer
Multiples of 1821 are:
1821, 3642, 5463, 7284, 9105, 10926, 12747, 14568, 16389, 18210, 20031, 21852, 23673, 25494, 27315, 29136, 30957, 32778, 34599, 36420, 38241, 40062, 41883, 43704, 45525, 47346, 49167, 50988, 52809, 54630, 56451, 58272, 60093, 61914, 63735, 65556, 67377, 69198, 71019, 72840, 74661, 76482, 78303, 80124, 81945, 83766, 85587, 87408, 89229
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