# What is the least common multiple of 3, 4, and 7?

Least Common Multiple of $3$, $4$ and $7$ is $84$.
As $3$ and $7$ are prime and the only factor of $4$ (other than $1$ and itself) is $2$, another prime, with no common factor between three numbers.
Hence, Least Common Multiple of $3$, $4$ and $7$ is $3 \times 4 \times 7 = 84$.