import java.util.*; public class Main { public static void main (String[] args) { Scanner sc = new Scanner(System.in); long a = sc.nextLong(); long b = sc.nextLong(); long c = sc.nextLong(); long money = (a - 1) + b; long count = c / money; long mod = c % money; long ans = count * a + mod; System.out.println(ans); } }