class Main:

    def add(x, y):
        return x + y

    def subtract(x, y):
        return x - y

    def multiply(x, y):
        return x * y

    def divide(x, y):
        return x /y

    print('Welcome to Lippy\'s Calculator! Enter a number to select the operation you want: ')
    print('1. Add')
    print('2. Subtract')
    print('3. Multiply')
    print('4. Divide')

    choice = input('Enter choice 1/2/3/4')

    num1 = int(input('Enter the first number: '))
    num2 = int(input('Enter the second number: '))

    if choice == '1':
        print(num1, ' + ', num2, ' = ', add(num1, num2))

    elif choice == '2':
        print(num1, ' - ', num2, ' = ', subtract(num1, num2))

    elif choice == '3':
        print(num1, ' * ', num2, ' =', multiply(num1, num2))

    elif choice == '4':
        print(num1, ' / ', num2, ' = ', divide(num1, num2))
    else:
        print('Invalid input, try the options i\'ve given to you dummy.')