Answer
Multiples of 668 are:
668, 1336, 2004, 2672, 3340, 4008, 4676, 5344, 6012, 6680, 7348, 8016, 8684, 9352, 10020, 10688, 11356, 12024, 12692, 13360, 14028, 14696, 15364, 16032, 16700, 17368, 18036, 18704, 19372, 20040, 20708, 21376, 22044, 22712, 23380, 24048, 24716, 25384, 26052, 26720, 27388, 28056, 28724, 29392, 30060, 30728, 31396, 32064, 32732
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