#include <stdio.h>
#define INFINIT 100000000

int main()
{
  	long long di=0,nr=0,k=0;

	freopen("next.in","r",stdin);
	freopen("next.out","w",stdout);
    scanf("%lld\n",&nr);
	scanf("%lld",&di);
    for(k=nr;k<=INFINIT;k++)
	{
		if(k%di==0)
		{
		printf("%lld",k);
	    break;
		};
	};
	
  return 0;
}