package main
import "fmt"
func gcd(first, second int) int {
if second == 0 {
return first
}
return gcd(second, first%second)
func Lcm(first, second int) int {
return first / gcd(first, second) * second
func main() {
fmt.Println(Lcm(3, 0))
fmt.Println(Lcm(4, 0))