import java.io.*; import java.util.*; public class Main_yukicoder604 { private static Scanner sc; private static Printer pr; private static void solve() { long a = sc.nextLong(); long b = sc.nextLong(); long c = sc.nextLong(); if (c <= a) { pr.println(c); } else { long tmp = a - 1 + b; pr.println(c / tmp * a + c - c / tmp * tmp); } } // --------------------------------------------------- public static void main(String[] args) { sc = new Scanner(System.in); pr = new Printer(System.out); solve(); pr.close(); sc.close(); } private static class Printer extends PrintWriter { Printer(PrintStream out) { super(out); } } }