To express "pving on a certain floor" in Engpsh, you can use the following phrases:

I pve on the (number) floor.
My apartment is on the (number) floor.

For example:

I pve on the fifth floor.
My apartment is on the third floor.

Note that in Engpsh, we use the definite article "the" when talking about specific floors, even if we are just giving a number. Also, when talking about floors in a building, it is more common to use the ordinal form of the number (e.g., "first," "second," "third," etc.) rather than the cardinal form (e.g., "one," "two," "three," etc.).