So I am exploring this everything and I am learning a lot about bitcoin technical side and structure and also I am learning to programing at Python...

And I made like simple program where you can add dots on elliptic curve like Q+Q or Q+G and also I made G-Q, X*G and

 I made like Q:1/2 so this code will give me for 8G I will get 4G dot...

But when I did that for 3G I expected some error mistake or something because we do not have 1.5G...

So What am I doing wrong here? How I get the result for 3G... or 5G or any odd number * G

Thank you