LCM( 378, 900 ) = 18900
The formula for finding LCM is
$$ \text{LCM} (a, b) = \frac{ a \cdot b }{ \text{GCD}(a,b)} $$In this example we have: a = 378, b = 900 and GCD(378, 900) = 18.
$$ \text{LCM} (378, 900) = \frac{ 378 \cdot 900 }{ \text{GCD}(378,900)} = \frac{ 340200 }{ 18 } = 18900 $$