#include <bits/stdc++.h>
#include <vector>
#include <iostream>
#include <cstring>
#include <algorithm>
#include <queue>
#define ll long long
#define N 500005
const int INF=0x3f3f3f3f;
const int mod=1e9 + 7;
using namespace std;
ll a[N];
int main(){
	int a, b, t;
	cin >> a >> b >> t;
	int sum = 0;
	while(t >= 0){
		t -= a;
		if(t >= 0) sum += b;
	}
	cout << sum << endl;
	return 0;
}
