Answer
Multiples of 609 are:
609, 1218, 1827, 2436, 3045, 3654, 4263, 4872, 5481, 6090, 6699, 7308, 7917, 8526, 9135, 9744, 10353, 10962, 11571, 12180, 12789, 13398, 14007, 14616, 15225, 15834, 16443, 17052, 17661, 18270, 18879, 19488, 20097, 20706, 21315, 21924, 22533, 23142, 23751, 24360, 24969, 25578, 26187, 26796, 27405, 28014, 28623, 29232, 29841
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