Answer
Multiples of 821 are:
821, 1642, 2463, 3284, 4105, 4926, 5747, 6568, 7389, 8210, 9031, 9852, 10673, 11494, 12315, 13136, 13957, 14778, 15599, 16420, 17241, 18062, 18883, 19704, 20525, 21346, 22167, 22988, 23809, 24630, 25451, 26272, 27093, 27914, 28735, 29556, 30377, 31198, 32019, 32840, 33661, 34482, 35303, 36124, 36945, 37766, 38587, 39408, 40229
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