how to make a simple calculator program with python and glade code example

Example: simple calculator in python

#Simple Calculator Program in Python by Rupesh Singh

def sum1(first_input, second_input):    # Sum function "+"
    result1 = first_input + second_input
    print("Your Answer is:-", result1)
    return

def minus(first_input, second_input):    # Minus function "-"
    result2 = first_input - second_input
    print("Your Answer is:-", result2)
    return

def multi(first_input, second_input):    # Multiplication function "*"
    result3 = first_input * second_input
    print("Your Answer is:-", result3)
    return

def div(first_input, second_input):    # Division function "/"
    result4 = first_input / second_input
    result4 = float(round(result4))
    print("Your Answer is:-", result4)
    return

# User Input
first_input = int(input("Enter your 1st Input:- "))
command = input("What you want to do (+, -, *, /):- ")
second_input = int(input("enter your 2nd Input:- "))

if command == "+":
    sum1(first_input, second_input)
elif command == "-":
    minus(first_input, second_input)
elif command == "*":
    multi(first_input, second_input)
elif command == "/":
    div(first_input, second_input)
else:
    print("Command Error!")