LCM( 8, 65 ) = 520
The formula for finding LCM is
$$ \text{LCM} (a, b) = \frac{ a \cdot b }{ \text{GCD}(a,b)} $$In this example we have: a = 8, b = 65 and GCD(8, 65) = 1.
$$ \text{LCM} (8, 65) = \frac{ 8 \cdot 65 }{ \text{GCD}(8,65)} = \frac{ 520 }{ 1 } = 520 $$