LCM( 6, 27 ) = 54
The formula for finding LCM is
$$ \text{LCM} (a, b) = \frac{ a \cdot b }{ \text{GCD}(a,b)} $$In this example we have: a = 6, b = 27 and GCD(6, 27) = 3.
$$ \text{LCM} (6, 27) = \frac{ 6 \cdot 27 }{ \text{GCD}(6,27)} = \frac{ 162 }{ 3 } = 54 $$