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Find the LCM of 12 and 56.

This is how I do them but if incorrect I would appreciate the correct notation being pointed out to me

12/2 = 6 My prime factors of 12 are therefore 2, 6

56/2 = 28, and 28/2 = 14, and 14/2 = 7

my prime factors are; 2, 6, 7, 14

My common factors being 2

my lowest common multiple being = 1176?

12/4 = 3, therefore 3,4

56/14 = 4 therefore 4,14

common factors are 4

Lowest common multiple is 3 x 4 x 14 = 168

so I am assuming there is a specific notation (method) to finding the LCM's without mistakes?