#include<fstream>
using namespace std;
ifstream fin("next.in");
ofstream fout("next.out");
int main()
{ int n,d,i;
fin>>n>>d;
for(i=n;i<=999999999;i++)
	if(i%d==0){fout<<i;break ;}
	fin.close();
	fout.close();
	return 0;
}