text: import sys 
  import os
  
  end = False #Creates a loop 
  menu = 0 #Sets the main menu
  
  while not end: #Execute's the loop 
      if menu == 0: 
          os.system('cls' if os.name == 'nt' else 'clear') #Clears the screen
          print("Main Menu")
          print("1. Addition")
          print("2. Multiplication")
          print("3. Division")
          print("4. Exit")
          opt = input( "Please Select an Option (1-3): ") #Creates a variable
          if opt == "1":
              menu = 1
          if opt == "2":
              menu = 2
          if opt == "3":
              menu = 3
          if opt == "4":
              os.system('cls' if os.name == 'nt' else 'clear')
              exit()
      
      if menu == 1:
          os.system('cls' if os.name == 'nt' else 'clear') #Clears the screen
          print("Welcome to the Python Addition Calculator")
          num1 = int(input("Give me a number to add "))
          num2 = int(input("Give me another number to add "))
          print(num1,"+",num2,"=", num1 + num2)
          print("")
          print("1. Add more numbers")
          print("2. Go back")
          opt = input( "Please Select an Option (1-2): ") 
          if opt == "1":
              menu = 1
          if opt == "2":
              menu = 0
  
      if menu == 2:
          os.system('cls' if os.name == 'nt' else 'clear') #Clears the screen
          print("Welcome to the Python Multiplication Calculator")
          num1 = int(input("Give me a number to multiply "))
          num2 = int(input("Give me another number to multiply "))
          print(num1,"x",num2,"=", num1 * num2)
          print("")
          print("1. Multiply more numbers")
          print("2. Go back")
          opt = input( "Please Select an Option (1-2): ") 
          if opt == "1":
              menu = 2
          if opt == "2":
              menu = 0
  
      if menu == 3:
          os.system('cls' if os.name == 'nt' else 'clear') #Clears the screen
          print("Welcome to the Python Division Calculator")
          num1 = int(input("Give me a number to divide "))
          num2 = int(input("Give me another number to divide "))
          print(num1,"÷",num2,"=", num1 // num2)
          print("")
          print("1. Divide more numbers")
          print("2. Go back")
          opt = input( "Please Select an Option (1-2): ") 
          if opt == "1":
              menu = 3
          if opt == "2":
              menu = 0
  