Answer
Multiples of 990 are:
990, 1980, 2970, 3960, 4950, 5940, 6930, 7920, 8910, 9900, 10890, 11880, 12870, 13860, 14850, 15840, 16830, 17820, 18810, 19800, 20790, 21780, 22770, 23760, 24750, 25740, 26730, 27720, 28710, 29700, 30690, 31680, 32670, 33660, 34650, 35640, 36630, 37620, 38610, 39600, 40590, 41580, 42570, 43560, 44550, 45540, 46530, 47520, 48510
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