Answer
Multiples of 690 are:
690, 1380, 2070, 2760, 3450, 4140, 4830, 5520, 6210, 6900, 7590, 8280, 8970, 9660, 10350, 11040, 11730, 12420, 13110, 13800, 14490, 15180, 15870, 16560, 17250, 17940, 18630, 19320, 20010, 20700, 21390, 22080, 22770, 23460, 24150, 24840, 25530, 26220, 26910, 27600, 28290, 28980, 29670, 30360, 31050, 31740, 32430, 33120, 33810
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