#include <bits/stdc++.h>
using namespace std;
int main(){
	double n,m,l;
	cin>>n>>m>>l;
	cout<<n*l/m;
	return 0;
}

/**************************************************************
	Problem: 1323
	User: zhouhongyi
	Language: C++
	Result: Accepted
	Time:8 ms
	Memory:2072 kb
****************************************************************/