LCM( 224, 336 ) = 672
The formula for finding LCM is
$$ \text{LCM} (a, b) = \frac{ a \cdot b }{ \text{GCD}(a,b)} $$In this example we have: a = 224, b = 336 and GCD(224, 336) = 112.
$$ \text{LCM} (224, 336) = \frac{ 224 \cdot 336 }{ \text{GCD}(224,336)} = \frac{ 75264 }{ 112 } = 672 $$