print("Hi, I am Jenny, your personal bot.")
command = input("How can I help? ")
# code for adding numbers
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 is like having possibilities other than the first one
# code for subtracting numbers
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)

# code for multiplying numbers
elif command == "multiply":
    print("Let's multiply some numbers.")
    input1 = input("Number1- ")
    input2 = input("Number2- ")
    number1 = int(input1)
    number2 = int(input2)
    result = number1*number2
    output = str(result)
    print(input1 + "X" + input2 + "=" + output)

# code for dividing numbers
elif command == "division":
    print("Let's divide some numbers.")
    input1 = input("Number1- ")
    input2 = input("Number2- ")
    number1 = int(input1)
    number2 = int(input2)
    result = number1/number2
    output = str(result)
    print(input1 + "/" + input2 + "=" + output)

#code for calculating area of a triangle
elif command == "area of a triangle":
    print("Let's calculate the area of a triangle.")
    print("Firstly, the formula for the area of a triangle is: 1/2 X Base X Height.")
    input1 = input("Base- ")
    input2 = input("Height- ")
    number1 = int(input1)
    number2 = int(input2)
    result = (1/2)*number1*number2
    output = str(result)
    print("1/2 X " + input1 + "X" + input2 + "=" + output)

else:
    print("I don't understand.")