LCM( 406, 757 ) = 307342
The formula for finding LCM is
$$ \text{LCM} (a, b) = \frac{ a \cdot b }{ \text{GCD}(a,b)} $$In this example we have: a = 406, b = 757 and GCD(406, 757) = 1.
$$ \text{LCM} (406, 757) = \frac{ 406 \cdot 757 }{ \text{GCD}(406,757)} = \frac{ 307342 }{ 1 } = 307342 $$