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);
	} 
}