#include<stdio.h>
#include<iostream.h>
int main(void) {
FILE *in=fopen("next.in","rt"),*out=fopen("next.out","w+");
long n,d,m,i;
fscanf(in,"%ld",&n);
fscanf(in,"%ld",&d);
for (i=n;i<=1000000000;i++){
 if (i%d==0) {
  m=i;
  break;
 }
}
fprintf(out,"%ld",m);
return 0;
}