#include <fstream>

using namespace std;

ifstream f ("next.in");
ofstream g ("next.out");

unsigned long long nr1, nr2, i;

int main()
{
   f >> nr1 >> nr2;
   i = nr2;
    while (nr2 <= nr1)
        nr2 += i;
    g << nr2;
    return 0;
}