많다는

that there are many, that there is a lot of

→ 많다

많 many, much, a lot of + 다 Plain declarative ending + 는 present attributive ending

adjective Rare #23,819

that there are many, that there is a lot of Used before a noun such as 것 (thing), 뜻 (meaning), or 사실 (fact) to describe the fact or idea that something is plentiful.

KO: 이 동네에 카페가 많다는 걸 몰랐어요.

EN: I didn’t know there were so many cafés in this neighborhood.

Forms of 많다

일이 많다는 건 알지만, 여러분은 나를 구해 준 대가를 갚고 싶다고 했잖아요.

I know you have a lot on your plate, but you said you wanted to repay me for saving you.

그러면 계산한 것보다 층 이 많다는 뜻 이야

So does that mean there are more floors than you calculated?

— 더 플랫폼 (2019)

그냥 세상엔 좋은 사람이 많다는 것만 알아둬

Just know that there are a lot of good people in the world.

— 데이 워치 (2006)