#include<fstream.h>
ifstream f("next.in");
ofstream g("next.out");
long n,m,cat,rest,nr;
int main()
{
f>>n>>m;
cat=n/m;
rest=n%m;
if(rest)
nr=m*cat+m;
else
nr=m*cat;
g<<nr;
f.close();
g.close();
return 0;
}