#include<stdio.h>
#include <iostream>
int main()
{
    int n,d,m;
    FILE *f1,*f2;
    f1=fopen("next.in","r");
    f2=fopen("next.out","w");
    fscanf(f1,"%d%d",&n,&d);
    m=d;
	if(d>=m){
		fprintf(f2,"%d",d);
		return 0;
	};

    while(n>m){
                  m=m+d;
                  };
    if(m>=n)
             fprintf(f2,"%d",m);
    fclose(f1);
    fclose(f2);
    return 0;
}