게 나뉘다

be divided up like this

나뉘다 is the passive of 나누다: something falls into parts by itself rather than someone splitting it. Nearly every line here uses 이렇게 or 요렇게 "like this," because the speaker is pointing at a division in front of them or on screen: 요렇게 나뉘는 거죠, 존이 이렇게 나뉘어져 있어요?. The -게 adverb can also give the degree — 크게 나뉘다 "split into big categories," 복잡하게 나뉘어 있지 않고 "not divided up in a complicated way." 나누다 is you dividing something; 나뉘다 is it being divided.

Register: conversational, explaining