`color(#5C73B9ff)(H)color(#6B68C0ff)(o)color(#795DC6ff)(r)color(#8852CDff)(i)color(#9646D4ff)(z)color(#A53BDAff)(o)color(#B330E1ff)(n)`

#include <iostream>
using namespace std;

int main() {
    int a, b;
    cin >> a >> b;
    cout << b * (a/b);
}

#include <bits/stdc++.h>
#define ll long long 
using namespace std;
int a,b;
signed main(){
   cin>>a>>b;
   cout<<a-(a%b);
}