using System;

public class Hello
{
    public static long a, b, c;
    static void Main()
    {
        string[] line = Console.ReadLine().Trim().Split(' ');
        a = long.Parse(line[0]);
        b = long.Parse(line[1]);
        c = long.Parse(line[2]);
        getAns();
    }
    static void getAns()
    {
        var s = a + b - 1;
        var t = c / s;
        var t2 = c % s;
        var ans = t * a + t2;
        Console.WriteLine(ans);
    }
}