Korean pronunciation lookup
마쳤고
Said in one Korean podcast line.
대강 이렇게 해서 음 마쳤고요.
Basically, it's done like this.

프로그래머를 위한 선형대수Episode 5 - 1.3.1(105쪽)부터 1.3.3(125쪽)까지
The shows belong to their publishers, and each line plays from the publisher’s own file. Translations are machine-made. Korean books and courses on Amazon (affiliate link).