#include <bits/stdc++.h>

using namespace std;

int main()
{
    cin.tie(0);
    ios::sync_with_stdio(false);

    int a,b,c;
    cin >> a >> b >> c;
    a*=c;
    long double res = a;
    res/=b;

    cout << fixed;
    cout.precision(16);

    cout << res << '\n';
    
    return 0;
}