54 = 2 x 27 = 2 x 3 x 9 = 2 x 3 x 3 x 3. 132 = 2 x 66 = 2 x 2 x 33 = 2 x 2 x 3 x 11. GCF = product of the factors both numbers have in common = 2 x 3 = 6. LCM = 54 x 132 ÷ GCF = 1188. Or, LCM = product of all factors of both numbers, counting common factors only once = 2 x 3 x 3 x 3 x 2 x 11 = 1188.
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