Another thing.
You don't need to copy and paste the entire program from PyCharma here to CodeWars Solution, the function itself is enough. So you don't need to copy this part

if __name__ == '__main__':
    print(square_area(4))
    print(square_area(7))
    print(square_area(4576))
    print(square_area(2315.1345))

just a definition of your function, possibly a description of the program.
See how others are doing.

Great job Oskar :)

Code more tasks.
Remeber, I watching you ;)
And, ofcourse, I'll help you with your tasks.
Do, at least, one task per day, ok?