JF-ExcMethods08.Factorial Division

import java.util.Scanner;

public class Exc8FactorialDivision {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        int first = Integer.parseInt(scanner.nextLine());
        int second = Integer.parseInt(scanner.nextLine());
        long firstFactorial = getFactorialResult(first);
        long secondFactorial = getFactorialResult(second);
        System.out.printf("%.2f",(firstFactorial*1.0 / secondFactorial));
    }

    private static long getFactorialResult(int n) {
        long factorial = 1;
        for (int i = 1; i <= n; i++) {
            factorial = factorial * i;
        }
        return factorial;
    }
}