08. Factorial Division

import java.util.Locale;
import java.util.Scanner;

public class ProjectsCreation {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        int number1 = Integer.parseInt(scanner.nextLine());
        int number2 = Integer.parseInt(scanner.nextLine());
        long factorial1 = calculateFactorial(number1);
        long factorial2 = calculateFactorial(number2);
        double result =  factorial1 * 1.0  / factorial2;
        System.out.printf("%.2f", result);

    }

    static long calculateFactorial(int number)  {
        long fact = 1;
        for (int i = 1; i <= number ; i++) {
            fact = fact * i;
        }
        //1 * 2 * 3 * 4 * 5
        return fact;
    }

}