as far as i know 만큼 represents the meaning of “as much as” or “to the point of” doing or being something.
저만큼as much as me
이만큼 as much as this
놀랄 만큼 to the point of one being surprised = = surprisingly
얼마만큼 필요해요?
= How much (of it) do you need?
한국에서만큼 자주 안 만나요
We don’t meet as often as in Korea.