print("Hi, I am R6D6, your personal math bot")
print("Please enter a single word command when requested:  ")
command = input("How may I help you: add or subtract or average or shopping or split cost of meal?  ")

if command == "add" or command == "plus":
    print("Let's add some numbers")
    number1 = int(input("number 1:  "))
    number2 = int(input("number 2:  "))
    result = number1 + number2

    print("Results:", number1, "+" ,number2, "=", result)

elif command == "subtract" or command == "minus":
    print("Let's substract some numbers")
    number1 = int(input("number 1: "))
    number2 = int(input("number 2: "))
    result = number1 - number2

    print("Results:", number1, "minus", number2, "=", result)

elif command == "average":
    how_many = input("How many numbers do you want to average? ")
    how_many = int(how_many)
    total = 0
    for number_count in range(how_many):
        number = input("Enter number " + str(number_count) + " = ")
        total = total + int(number)
    result = total / how_many
    print("average is = " + str(result))

elif command == "meal":
    how_many = int(input("How many person dined?  "))
    meal_cost = float(input("What did the meal cost? "))
    tip = float(input("What percent tip do you want to leave? "))
    local_tax = float(input("Hoat is the local tax percent rate?  "))
    total_meal_cost = (meal_cost) + (meal_cost * tip/100) + (meal_cost * local_tax/100)
    total_diner =(total_meal_cost / how_many)
    print("Cost per diner is", total_diner, "USD")

else:
    print("Sorry, this is the add or subtract or average or meal math bot")