게 들어가다

go in; be packed in

Two rather different things. Of a person entering, the word in front is usually 이렇게 or 어떻게 and often refers to a move being demonstrated on camera: 이렇게 들어가야지 왜 저기서 소심하게 찍고 있어. Of food, it says how much of an ingredient is packed in — 그거는 양배추가 이렇게 두껍게 들어간 토스트라서 'toast with the cabbage in that thick.' And 어떻게 들어갔지? here is about how all that food fit inside someone, not about entering a place.