Answer
Multiples of 405 are:
405, 810, 1215, 1620, 2025, 2430, 2835, 3240, 3645, 4050, 4455, 4860, 5265, 5670, 6075, 6480, 6885, 7290, 7695, 8100, 8505, 8910, 9315, 9720, 10125, 10530, 10935, 11340, 11745, 12150, 12555, 12960, 13365, 13770, 14175, 14580, 14985, 15390, 15795, 16200, 16605, 17010, 17415, 17820, 18225, 18630, 19035, 19440, 19845
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