using System;

class Program
{
    static void Main()
    {
        string[] input = Console.ReadLine()!.Split();
        double D = double.Parse(input[0]);
        double W = double.Parse(input[1]);
        double H = double.Parse(input[2]);

        double avgHolidays = D * H / W;
        Console.WriteLine(avgHolidays);
    }
}