Python 101: Maths with selection

# Futurelearn: Python 101 from RPi Foundation - Bot with + - * / selection
print("Hi, I am your personal 'bot' called Dave.")

command = input("How can I help you? ")

if command == "add" or command == "plus":
    print("Let's add some numbers")
    input_1 = input("Number 1> ")
    input_2 = input("Number 2> ")
    number_1 = int(input_1)
    number_2 = int(input_2)
    result = number_1 + number_2
    output = str(result)
    print(input_1 + " + " + input_2 + " = " + output)
elif command == "subtract" or command == "take away":
    print("Let's subtract some numbers")
    input_1 = input("Number 1> ")
    input_2 = input("Number 2> ")
    number_1 = int(input_1)
    number_2 = int(input_2)
    result = number_1 - number_2
    output = str(result)
    print(input_1 + " - " + input_2 + " = " + output)
elif command == "multiply" or command == "times":
    print("Let's multiply some numbers")
    input_1 = input("Number 1> ")
    input_2 = input("Number 2> ")
    number_1 = int(input_1)
    number_2 = int(input_2)
    result = number_1 * number_2
    output = str(result)
    print(input_1 + " * " + input_2 + " = " + output)
elif command == "divide":
    print("Let's divide some numbers")
    input_1 = input("Number 1> ")
    input_2 = input("Number 2> ")
    number_1 = int(input_1)
    number_2 = int(input_2)
    result = number_1 / number_2
    output = str(result)
    print(input_1 + " / " + input_2 + " = " + output)
else:
    print("sorry I dont understand")