Answer
Multiples of 3990 are:
3990, 7980, 11970, 15960, 19950, 23940, 27930, 31920, 35910, 39900, 43890, 47880, 51870, 55860, 59850, 63840, 67830, 71820, 75810, 79800, 83790, 87780, 91770, 95760, 99750, 103740, 107730, 111720, 115710, 119700, 123690, 127680, 131670, 135660, 139650, 143640, 147630, 151620, 155610, 159600, 163590, 167580, 171570, 175560, 179550, 183540, 187530, 191520, 195510
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