08. Factorial Division

package Methods_Exercise;

import java.util.Scanner;

public class FactorialDivision_08 {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        int firstNumber = Integer.parseInt(scanner.nextLine());
        int secondNumber = Integer.parseInt(scanner.nextLine());

        //факториел на първото число
        long firstNumberFactorial = calculateFactorial(firstNumber);
        //факториел на второто число
        long secondNumberFactorial = calculateFactorial(secondNumber);
        //факториел1 / факториел2 -> печатаме
        double result = firstNumberFactorial * 1.0 / secondNumberFactorial;
        System.out.printf("%.2f", result);
    }

    private static long calculateFactorial (int number) {
        long fact = 1;
        for (int i = 1; i <= number ; i++) {
            fact = fact * i;
        }
        return fact;
    }
}