after 200 hours I need someone to tell me how to get into that vent. I keep on trying to use the chair but it keeps falling over. I have spent too long on this please help

edit: I'm at 300 hours but I'm still stuck. all the chairs are over please help

edit 2: im at 400 hours now and i finally got past the chair :)

after 200 hours I need someone to tell me how to get into that vent. I keep on trying to use the chair but it keeps falling over. I have spent too long on this please help edit: I'm at 300 hours but I'm still stuck. all the chairs are over please help edit 2: im at 400 hours now and i finally got past the chair :)