Fraction Class

You are developing a simple calculator and your task is to create a Python class Fraction which represents a mathematical fraction.

The class should have 5 magic methods:

• __add__: This method should take another Fraction object as an argument and return a new Fraction object which is the sum of the original Fraction and the argument Fraction.

• __sub__: This method should take another Fraction object as an argument and return a new Fraction object which is the result of the original Fraction subtracted by the argument Fraction.

• __mul__: This method should take another Fraction object as an argument and return a new Fraction object which is the result of the original Fraction multiplied by the argument Fraction.

• __truediv__: This method should take another Fraction object as an argument and return a new Fraction object which is the result of the original Fraction divided by the argument Fraction. If the argument Fraction has a numerator of zero, this method should raise a ZeroDivisionError.

• __str__: This method should return the fraction in the numerator / denominator format. The method should return a string representation of the fraction in its simplest form (for example, "2 / 3" instead of "4 / 6"). To simplify a fraction, divide the numerator and the denominator by their greatest common divisor (GCD).

The Fraction class should be able to be instantiated with two parameters, a numerator and a denominator. Both parameters should be integers, with the denominator defaulting to 1 if not provided. If the denominator is 0, the program should raise a ValueError in the __init__ method.