using System;
using System.Linq;
using System.Collections.Generic;

namespace Algorithm
{
    class Program
    {
        static void Main(string[] args)
        {
            var l = Console.ReadLine().Split().Select(double.Parse).ToArray();
            double A = l[0], B = l[1], C = l[2];

            Console.WriteLine(A / B * C);
        }
    }
}