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The LCM of 640 and 28 is 4480.
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Find least common multiple (LCM) of: 1280 & 56 320 & 14 1920 & 84 3200 & 140 4480 & 196 1280 & 28 640 & 56 1920 & 28 640 & 84 3200 & 28 640 & 140 4480 & 28 640 & 196
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