import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		String nx = sc.nextLine();
		String[] nxArr = nx.split(" ");
		long a = Long.parseLong(nxArr[0]);
		long b = Long.parseLong(nxArr[1]);
		long c = Long.parseLong(nxArr[2]);
		sc.close();

		long t =b+(a-1);
		System.out.println(c/t*a+(c-c/t*t));

	}

}