#include <bits/stdc++.h>
#include <atcoder/lazysegtree>
using namespace std;
using ll = long long;
using ld = long double;
template <class T = ll>
using vc = vector<T>;
template <class T = ll>
using vvc = vc<vc<T>>;
void solve();
ll op(ll a, ll b) { return a + b; }
ll e() { return 0; }
ll mapping(ll f, ll x) { return f + x; }
ll composition(ll f, ll g) { return f + g; }
ll id() { return 0; }
int main() {
    cin.tie(nullptr);
    ios::sync_with_stdio(false);
    cout << fixed << setprecision(20);
    ll t = 1;
    // cin >> t;
    for (int i = 1; i <= t; i++) solve();
    return 0;
}
#define rep(i, a, b) for (ll i = (a); i < (b); i++)
ll dy[4] = {0, 1, 0, -1}, dx[4] = {1, 0, -1, 0};
void solve() {
    ll a, b, x;
    cin >> a >> b >> x;
    ll res = (x + a - 1) / a * b;
    cout << res << endl;
}