Problem:
Score : 100 points

Problem Statement

A biscuit making machine produces B biscuits at the following moments: A seconds, 2A seconds, 3A seconds and each subsequent multiple of A seconds after activation.

Find the total number of biscuits produced within T + 0.5 seconds after activation.

Constraints

All values in input are integers.

1 \leq A, B, T \leq 20

Input

Input is given from Standard Input in the following format:

A B T

Output

Print the total number of biscuits produced within T + 0.5 seconds after activation.

Sample Input 1

3 5 7

Sample Output 1

10

Five biscuits will be produced three seconds after activation.

Another five biscuits will be produced six seconds after activation.

Thus, a total of ten biscuits will be produced within 7.5 seconds after activation.

Sample Input 2

3 2 9

Sample Output 2

6

Sample Input 3

20 20 19

Sample Output 3

0

Solution in C++14 (GCC 5.4.1) (judge verdict: Accepted)

#pragma warning(disable:4996)
#include <bits/stdc++.h>
#include <boost/multiprecision/cpp_int.hpp>
using namespace std;

#define ALL(a) begin(a), end(a)
#define TPL template
#define TNM typename

using ll = long long;
using ull = unsigned long long;
using mint = boost::multiprecision::cpp_int; //int1024_t etc...
TPL<TNM T> using vec = vector<T>;
TPL<TNM T> using vec2 = vec<vec<T>>;
TPL<TNM T> using vec3 = vec<vec2<T>>;

TPL<TNM T> inline bool chmin(T&a, T&b) { if (a > b) { a = b; return true; } return false; }
TPL<TNM T> inline bool chmax(T&a, T&b) { if (a < b) { a = b; return true; } return false; }
TPL<TNM V, TNM H> void resize(vector<V>& _v, const H _h) { _v.resize(_h); }
TPL<TNM V, TNM H, TNM ... T> void resize(vector<V>& _v, const H& _h, const T& ... _t) { _v.resize(_h); for (auto& __v : _v) resize(__v, _t ...); }
TPL<TNM V, TNM T> TNM enable_if<!is_class<V>::value, void>::type fill(vector<V>& _v, const T &_t) { std::fill(ALL(_v), _t); }
TPL<TNM V, TNM T> TNM enable_if<is_class<V>::value, void>::type fill(vector<V>& _v, const T &_t) { for (auto &_e : _v) fill(_e, _t); }
TPL<TNM T> inline void UNIQUE(vector<T>& _v) { sort(ALL(_v)); _v.erase(unique(ALL(_v)), _v.end()); }
struct pre_ { pre_() { cin.tie(nullptr); ios::sync_with_stdio(false); cout << fixed << setprecision(6); } } pre__;

int main(void) {
	int A, B, T;
	cin >> A >> B >> T;
	int t = 0;
	int ans = 0;
	while (t + A <= T) {
		ans += B;
		t += A;
	}
	cout << ans << endl;
	return 0;
}