This is the 18446th most frequent Russian word.
этажах
"Этажах" means "floors" or "stories" (prepositional plural form).
The word "этажах" is in locative plural form, used to specify location within the upper floors.
На верхних этажах этого здания расположены офисы компании.
On the upper floors of this building, the company's offices are located.
Here, "этажах" is used in locative plural form to describe the placement of surveillance cameras across the floors.
На всех этажах этого жилого дома установлены камеры видеонаблюдения.
On all floors of this residential building, surveillance cameras are installed.
In this case, "этажах" refers to the various levels of the shopping mall as the meeting places.