"We are going to the last floor."
Translation:Ni iras al la lasta etaĝo.
Yes, you may see such examples in textbooks, but such constructions are not really widely used. See here: http://bertilow.com/pmeg/gramatiko/rolmontriloj/n/direkto.html
According to our local expert, salivanto, himself quoting an other expert, not only is the Kellerman manual out of date, but the work of a then beginner, not to be trusted.