LCM( 170, 238 ) = 1190
The formula for finding LCM is
$$ \text{LCM} (a, b) = \frac{ a \cdot b }{ \text{GCD}(a,b)} $$In this example we have: a = 170, b = 238 and GCD(170, 238) = 34.
$$ \text{LCM} (170, 238) = \frac{ 170 \cdot 238 }{ \text{GCD}(170,238)} = \frac{ 40460 }{ 34 } = 1190 $$