#include<stdio.h>
using namespace std;
long long d,n,p;
int gasit,q=1;
int main()
{
    FILE*f1;
    FILE*f2;
    f1=fopen("next.in","rb");
    f2=fopen("next.out","wb");
    fscanf(f1,"%lld",&n);
    fscanf(f1,"%lld",&d);
    while(gasit==0)
    {
        p=d*q;
        if((p>=n)&&(p%d==0))
            gasit=1;
        ++q;
    }
    fprintf(f2,"%lld",p);
    return 0;
}