HEY its me =), Jessica

, you said earlier you wrote a riddle =), so yeah, i checked it, and i think i know the answer :O,
Answer: The elevator is only made to go up to the 7th floor, so there isn't an elevator leading to any floor higher than 7th floor. So that's why he walked up the stairs to the "27th" floor.
wow, imagine he lived there for years and did that for years... That's really extreme O_O well i hope this is right

!!