Python decoding question. UnicodeDecodeError 'utf-8' codec can't decode byte 0xb5 in position 3

I'm making a shell out of Python.

import os
from subprocess import check_output
print(check_output("dir", shell=True).decode('utf-8'))

It is a program that returns and prints the returned value when you enter the cmd command using the subprocess module.

It works well if you enter a command with only English return values, but if you use a command mixed with Korean, for example, the dir command, UnicodeDecodeError occurs.

The error name is as follows 'utf-8' codec can't decode byte 0xb5 in position 3: invalid start byte

If the return value is mixed with byte and utf-8 like this, how should I decode it? ㅠ<