#include <stdio.h>
int main(void)
{
   FILE *f;
   f=fopen("next.in","r");
   int n; int d;
   fscanf(f,"%d %d",&n, &d);
   fclose(f);
   f=fopen("next.out","w");
   int numar;
   if(n%d==0)
   {
      numar=n;
   }
   else
   {
    //  numar=
   }
   n%d==0?numar=n:numar=(n/d)*d+d;
   fprintf(f,"%d",numar);
   fclose(f);  
   return 0;
}