Answer
Multiples of 684 are:
684, 1368, 2052, 2736, 3420, 4104, 4788, 5472, 6156, 6840, 7524, 8208, 8892, 9576, 10260, 10944, 11628, 12312, 12996, 13680, 14364, 15048, 15732, 16416, 17100, 17784, 18468, 19152, 19836, 20520, 21204, 21888, 22572, 23256, 23940, 24624, 25308, 25992, 26676, 27360, 28044, 28728, 29412, 30096, 30780, 31464, 32148, 32832, 33516
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