LCM( 52, 130 ) = 260
The formula for finding LCM is
$$ \text{LCM} (a, b) = \frac{ a \cdot b }{ \text{GCD}(a,b)} $$In this example we have: a = 52, b = 130 and GCD(52, 130) = 26.
$$ \text{LCM} (52, 130) = \frac{ 52 \cdot 130 }{ \text{GCD}(52,130)} = \frac{ 6760 }{ 26 } = 260 $$