Python console:

~/PythonProject$ python
Python 3.10.13 (main, Aug 24 2023, 12:59:26) [GCC 13.2.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> class Six:
...     def __repr__(self):
...         return '<Six>'
...     def __int__(self):
...         return 6
...     def __add__(self, other):
...         return int(self) + int(other)
...     __radd__ = __add__
... 
>>> six = Six()
>>> six
<Six>
>>> six + 1
7
>>> 1 + six
7
>>> six + Six()  # Addition OK
12
>>> six * 2  # Why Python doesn't use 6 + 6?
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: unsupported operand type(s) for *: 'Six' and 'int'
>>> 

Why do I have to add the __mul__ function to do multiplication instead of just 6 + 6?
I hope your answers help me.