//
//  Created by адин on 09.07.2018.
//  Copyright © 2018 Ionitas. All rights reserved.
//
#include <fstream>
using namespace std;
int main(){
    ifstream fin("next.in");
    ofstream fout("next.out");
    int n,d;fin>>n>>d;
    for(int i(1);i<1000000000;i++)
        if (i*d>=n){fout<<i*d;return 0;}
    return 0;
}