#include <bits/stdc++.h>

using namespace std;

int main()
{
    ifstream fin("next.in");
    ofstream fout("next.out");
    unsigned long long n,m,ok=0;
    fin>>n>>m;
    while(ok==0){if(n%m==0){fout<<n,ok=1;}
                 n++;}
                 fin.close();
                 fout.close();
                 return 0;}