#include <iostream>
#include <fstream>
using namespace std;

int main()
{
    ifstream f("next.in");
    ofstream g("next.out");
    int n, d, m, gasit = 0;
    f >> n;
    f >> d;
    m=n;
    while(gasit==0)
    {
        if(m%d==0) gasit=1;
        if(gasit==0) m++;
    }
    g << m;
    f.close();
    g.close();
    return 0;
}