Answer
Multiples of 780 are:
780, 1560, 2340, 3120, 3900, 4680, 5460, 6240, 7020, 7800, 8580, 9360, 10140, 10920, 11700, 12480, 13260, 14040, 14820, 15600, 16380, 17160, 17940, 18720, 19500, 20280, 21060, 21840, 22620, 23400, 24180, 24960, 25740, 26520, 27300, 28080, 28860, 29640, 30420, 31200, 31980, 32760, 33540, 34320, 35100, 35880, 36660, 37440, 38220
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