LCM( 26, 338 ) = 338
The formula for finding LCM is
$$ \text{LCM} (a, b) = \frac{ a \cdot b }{ \text{GCD}(a,b)} $$In this example we have: a = 26, b = 338 and GCD(26, 338) = 26.
$$ \text{LCM} (26, 338) = \frac{ 26 \cdot 338 }{ \text{GCD}(26,338)} = \frac{ 8788 }{ 26 } = 338 $$