C :

#include <stdio.h>
int main()
{
  int a, b, i;
  scanf("%d %d", &a, &b);
  for(i = a ; i <= (a * b); i ++)
  {
    if(i % a == 0 && i % b == 0)
    {
      printf("%d\n", i);
      break;
    }
  }
  return 0;
}

C++ :

#include<stdio.h>
int main()  
{ 
    int m,n; int m_cup,n_cup,res;
   scanf("%d%d",&m,&n);  
  if (m>0&&n>0)    
  {  
    m_cup=m;  
    n_cup=n;  
    res=m_cup%n_cup;   
    while(res!=0)   
    {  
       m_cup=n_cup;    
      n_cup=res;  
       res=m_cup%n_cup;   
    } 
     printf("%d\n",m*n/n_cup);    
  }
}

Pascal :

program p25598;
 var
  m,n,r,s:longint;
begin
 readln(m,n);
 s:=m*n;
 r:=m mod n;
 while r<>0 do
  begin
   m:=n;
   n:=r;
   r:=m mod n;
  end;
 writeln(s div n);
end.

Java :

import java.util.Scanner;
public class Main {
	public static void main(String[] args) {
		Scanner sc=new Scanner(System.in);
		int a=sc.nextInt(),b=sc.nextInt();
		int temp=0;
		for(int i=1;i<=a*b;i++){
			if(0==a*i%b){
				temp=a*i;
				break;
			}
		}
		System.out.println(temp);
	}
}