Answer
Multiples of 621 are:
621, 1242, 1863, 2484, 3105, 3726, 4347, 4968, 5589, 6210, 6831, 7452, 8073, 8694, 9315, 9936, 10557, 11178, 11799, 12420, 13041, 13662, 14283, 14904, 15525, 16146, 16767, 17388, 18009, 18630, 19251, 19872, 20493, 21114, 21735, 22356, 22977, 23598, 24219, 24840, 25461, 26082, 26703, 27324, 27945, 28566, 29187, 29808, 30429
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