#include <stdio.h>
#include <stdlib.h>
#define INFINIT 100000000

int main(int argc, char *argv[])
{
  	long long di=0,nr=0,k=0;
	FILE *i,*o;
	i=fopen("next.in","r");
	o=fopen("next.out","w");
    fscanf(i,"%lld\n",&nr);
	fscanf(i,"%lld",&di);
    for(k=nr;k<=INFINIT;k++)
	{
		if(k%di==0)
		{
		fprintf(o,"%lld",k);
	    break;
		};
	};
	
  return 0;
}