되는 걸

that it works

→ 되다
phrase Uncommon #11,344
that it works A shortened form of 되는 것을, used to make a clause the object of a verb such as 알다 (“know”). The exact meaning depends on context.
KO: 이 앱으로 예약이 되는 걸 확인했어요.
EN: I confirmed that you can make a reservation with this app.