print("Hi, I'm Marvin, your personal bot. Let's get started!")
command = input("How can I help? ")
if command == "add" or command == "addition" or command =="plus":
    print("Let's do some additions!")
    input1 = input("number one: ")
    input2 = input("number two: ")
    number1 = int(input1)
    number2 = int(input2)
    result = number1 + number2
    output = str(result)
    print(input1 + "+" + input2 + "=" + output)
elif command == "subtract" or command == "minus":
    print("Let's do some subtractions!")
    input1 = input("number one: ")
    input2 = input("number two: ")
    number1 = int(input1)
    number2 = int(input2)
    result = number1 - number2
    output = str(result)
    print(input1 + "-" + input2 + "=" + output)
elif command == "multiply":
    print("Let's do some multiplications!")
    input1 = input("number one: ")
    input2 = input("number two: ")
    number1 = int(input1)
    number2 = int(input2)
    result = number1 * number2
    output = str(result)
    print(input1 + "*" + input2 + "=" + output)
elif command == "divide":
    print("Let's do some division!")
    input1 = input("number one: ")
    input2 = input("number two: ")
    number1 = int(input1)
    number2 = int(input2)
    result = number1 / number2
    output = str(result)
    print(input1 + "/" + input2 + "=" + output)
elif command =="area":
    print("Let's calculate the area of a rectangle!")
    input1 = input("side a in centimetres: ")
    input2 = input("side b in centimetres: ")
    number1 = int(input1)
    number2 = int(input2)
    result = number1 * number2
    output = str(result)
    print("The area of the rectangle is " + output + " centimeters squared.")
else:
    print("Sorry- I do not understand that command.")
print("Bye!")