C :

#include <stdio.h>

void output( int m, int n ) {
  int t = m;
  while( t % n != 0 ) {
    t += m;
  }
  printf("%d\n", t);
}

int main(){
  int m, n;
  while( ~scanf("%d%d", &m, &n) ) 
        output(m, n);
}

C++ :

#include<bits/stdc++.h>
using namespace std;
int n,m;
int main()
{
    while(cin>>n>>m&&n&&m)
    {
    	cout<<n*m/__gcd(n,m)<<"\n";
	}
	return 0;
}