bot2-14.py

print("Hi, I am Marvin, your personal bot")
command = input("How can I help ? ")
if command =="add"or command == "plus" or command == "+":
    print ("lets add some numbers")
    input1 = input("Number 1> ")
    input2 = input("Number 2> ")
    number1 = int(input1)
    number2 = int(input2)
    result = number1 + number2
    output = str(result)
    print (input1 + " + " + input2+ " = " + output )

elif command == "substract" or command == "-":
    print ("lets substract some numbers")
    input1 = input("Number 1> ")
    input2 = input("Number 2> ")
    number1 = int(input1)
    number2 = int(input2)
    result = number1 - number2
    output = str(result)
    print (input1 + " - " + input2+ " = " + output )

elif command == "divide" or command == "/":
    print ("lets divide some numbers")
    input1 = input("Number 1> ")
    input2 = input("Number 2> ")
    number1 = int(input1)
    number2 = int(input2)
    result = number1 / number2
    output = str(result)
    print (input1 + " / " + input2+ " = " + output )

elif command == "multiply" or command == "x":
    print ("lets multiply some numbers")
    input1 = input("Number 1> ")
    input2 = input("Number 2> ")
    number1 = int(input1)
    number2 = int(input2)
    result = number1 * number2
    output = str(result)
    print (input1 + " x " + input2+ " = " + output )

elif command == "volume" or command == "vol":
    print("Volume of your swimming pool")
    print ("lets give : length; width and depth ")
    input1 = input("length > ")
    input2 = input("width  > ")
    input3 = input("depth  > ")
    number1 = int(input1)
    number2 = int(input2)
    number3 = int(input3)
    result = number1 * number2 + number3
    output = str(result)
    print (input1 + " m" +" x " + input2 + " m" +" x " + input3 +" m"+" = " + output +" m3")