#include <iostream>	//cin, cout
#include <vector>	//vector
#include <algorithm> //sort,min,max
#include <string>	//string
#include <ios>		//fixed
#include <iomanip>	//setprecision

using namespace std;

int main() {

	double A, B, C;
	cin >> A >> B >> C;

	double ans = A / B * C;
	cout << fixed << setprecision(10) << ans << endl;

	return 0;

}