Answer
Multiples of 520 are:
520, 1040, 1560, 2080, 2600, 3120, 3640, 4160, 4680, 5200, 5720, 6240, 6760, 7280, 7800, 8320, 8840, 9360, 9880, 10400, 10920, 11440, 11960, 12480, 13000, 13520, 14040, 14560, 15080, 15600, 16120, 16640, 17160, 17680, 18200, 18720, 19240, 19760, 20280, 20800, 21320, 21840, 22360, 22880, 23400, 23920, 24440, 24960, 25480
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