Aayush is correct. But I wonder if you mean Lowest Common Multiple. That is the lowest number that both will divide evenly into without remainder.
First factorise into prime factors
57 = 3 x 19
111 = 3 x 37
Then make sure you include one of each factor
So the LCM is 3 x 19 x 37 = 2109
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The GCF is 19.
The common factors are 1 and 19
19 is the greatest common factor. 19/19=1, 76/19=4.
The least common multiple of 28 and 76 is 532
The Least Common Multiple (LCM) of (37,12) is 444.