#include<fstream.h>
int main()
{ifstream fin("next.in");
long long int n,m=0,d;
fin>>n>>d;
fin.close();
if(n%d==0){m=n;}
else
     {
      while(n%d!=0)
      {
       n=n+1;
       m=n;
      }
     }
ofstream fout("next.out");
fout<<m;
return 0;}