Least common multiple

Built-in:

say Math.lcm(1001, 221)

Using GCD:

func gcd(a, b) {
    while (a) { (a, b) = (b % a, a) }
    return b
}
 
func lcm(a, b) {
    (a && b) ? (a / gcd(a, b) * b) : 0
}
 
say lcm(1001, 221)

Output:

17017