import java.util.*; public class Main { static Scanner sc = new Scanner(System.in); public static void main(String[] args) { long a = sc.nextLong(); long b = sc.nextLong(); long c = sc.nextLong(); long n = a-1+b; //a年間でn円 long x = c/n; long y = c%n; System.out.println(x*a+y); } }