#include <stdio.h>
int gcd(int a,int b){
    return b? gcd(b,a%b):a;
}
int lcm(int a,int b){
    return a*b/gcd(a,b);
}
int main()
{
    int a=3,b=4;
    printf("%d",lcm(a,b));
    return 0;
}