LCM( 123, 36 ) = 1476
The formula for finding LCM is
$$ \text{LCM} (a, b) = \frac{ a \cdot b }{ \text{GCD}(a,b)} $$In this example we have: a = 123, b = 36 and GCD(123, 36) = 3.
$$ \text{LCM} (123, 36) = \frac{ 123 \cdot 36 }{ \text{GCD}(123,36)} = \frac{ 4428 }{ 3 } = 1476 $$