Lowest Common Multiple/Examples/27 and 81

Example of Lowest Common Multiple of Integers
The lowest common multiple of $27$ and $81$ is:
 * $\lcm \set {27, 81} = 81$

Proof
We find the greatest common divisor of $27$ and $81$ using the Euclidean Algorithm:

Thus $\gcd \set {27, 81} = 27$.

Then: