A simple calculator for a first-grade college project

Calculator.java

import java.util.Arrays;
import java.util.Scanner;

public class Calculator {
    static Scanner sc = new Scanner(System.in);
    static double[] after_power = {};
    static char answer = 'n';
    public static void main(String[] args) {
        switch (choose_operation()) {
            case '+':
                System.out.println(addition(array_of_numbers()));
                break;
            case '-':
                System.out.println(subtraction(array_of_numbers()));
                break;
            case '/':
                System.out.println(division(array_of_numbers()));
                break;
            case '%':
                System.out.println(modulus(array_of_numbers()));
                break;
            case '*':
                System.out.println(multiplication(array_of_numbers()));
                break;
            case '!':
                System.out.println("Enter the num");
                int factorial_num = sc.nextInt();
                System.out.println(factorial(factorial_num));
                break;
            case '^':
                System.out.println("Enter the power");
                double power = sc.nextDouble();

                after_power = power(array_of_numbers(), power);
                System.out.println(Arrays.toString(after_power));

                System.out.println("Do you want do more operation? (y/n)");
                answer = sc.next().charAt(0);

                if(answer == 'y' || answer == 'Y'){
                    perform_an_operation(choose_operation(), after_power);
                }
                break;
            case 'Q':
                break;
            default:
                System.out.println("No operation");
        }
    }
    public static char choose_operation(){
        System.out.println("Choose the operation ( +, -, /, %, *, ^, !)");
        char operation = sc.next().charAt(0);
        return operation;
    }
    public static double[] array_of_numbers(){
        Scanner sc = new Scanner(System.in);

        System.out.println("Please enter how many numbers you want ?:");
        int number_of_inputs = sc.nextInt();

        double[] numbers = new double[number_of_inputs];

        System.out.println("Please enter your numbers");
        for(int i = 0; i < number_of_inputs; i++){
            numbers[i] = sc.nextDouble();
        }
        return numbers;
    }
    public static double addition(double numbers[]){
        double result = 0;
        for(int x = 0; x < numbers.length; x++){
            result = result + numbers[x];
        }
        return result;
    }
    public static double subtraction(double numbers[]){
        double result = 0;
        for(int x = 0; x < numbers.length; x++){
            result = result - numbers[x];
        }
        return result;
    }
    public static double division(double numbers[]){
        double result = numbers[0];

        for(int x = 1; x < numbers.length; x++){
            if(numbers[x] == 0)
                System.out.println("You can't divide by zero!");
            result = result / numbers[x];
        }
        return result;
    }
    public static double modulus(double numbers[]){
        double result = numbers[0];
        for(int x = 1; x < numbers.length; x++){
            if(numbers[x] == 0)
                System.out.println("You can't divide by zero!");
            result = result % numbers[x];
        }
        return result;
    }
    public static double multiplication(double numbers[]){
        double result = 1;
        for(int x = 0; x < numbers.length; x++){
            result = result * numbers[x];
        }
        return result;
    }
    public static double[] power(double[] array, double power) {
        double[] result = new double[array.length];
        for (int i = 0; i < array.length; i++) {
            result[i] = Math.pow(array[i], power);
        }
        return result;
    }
    public static int factorial(int number){
        if(number == 0)
            return 1;
        return number * factorial(number - 1);
    }
    public static void perform_an_operation(char operation, double[] list_of_numbers){

        switch (operation) {
            case '+':
                System.out.println(addition(list_of_numbers));
                break;
            case '-':
                System.out.println(subtraction(list_of_numbers));
                break;
            case '/':
                System.out.println(division(list_of_numbers));
                break;
            case '%':
                System.out.println(modulus(list_of_numbers));
                break;
            case '*':
                System.out.println(multiplication(list_of_numbers));
                break;
            case '^':
                System.out.println("Enter the power");
                double power = sc.nextDouble();
                after_power = power(list_of_numbers, power);
                System.out.println(Arrays.toString(after_power));
                System.out.println("Do you want do more operation? (y/n)");
                answer = sc.next().charAt(0);
                break;
            case 'Q':
                break;
            default:
                System.out.println("Not an operation");
        }
    }
}

calculator_system_question.md