print("Hi, I am Jenny, your personal bot.")
command = input("How can I help? ")
if command == "add":
    print("Let's add some numbers!")
    users_name = input("What is your name? ")
    print("Welcome to Math world, " + users_name)
    print("Let's add some numbers.")
    input1 = input("Number1- ")
    input2 = input("Number2- ")
    input3 = input("Number3- ")
    number1 = int(input1)
    number2 = int(input2)
    number3 = int(input3)
    result = number1 + number2 + number3
    output = str(result)
    print(input1 + "+" + input2 + "+" + input3 + "=" + output)
elif command == "subtract":
    print("Let's subtract some numbers.")
    input1 = input("Number1- ")
    input2 = input("Number2- ")
    number1 = int(input1)
    number2 = int(input2)
    result = number1 - number2
    output = str(result)
    print(input1 + "-" + input2 + "=" + output)
else:
    print("I don't understand.")