How many floors does your office building have and what floor are you on?
ご質問ありがとうございます。
「階」はfloorと言います。他の言い方はstoryです。例:「二階建て」=two-story building
上記に書いている英文はわかりやすい英語の文ですが、カジュアルで自然な言い方なら下記をご覧ください。
例文:What floor is your office and how many stories is the building?
ご参考になれば幸いです。
How many floors are there in your office building, and what floor is your office on?
What floor is your office located on, and how many stories is the building?
ーHow many floors are there in your office building, and what floor is your office on?
「オフィスの建物は何階建てで、オフィスは何回にありますか?」
How many floors are there ...? で「何階建てですか?」と聞けます。
what floor is ... on? で「…は何回にありますか?」と聞けます。
ーWhat floor is your office located on, and how many stories is the building?
「あなたのオフィスは何回に位置していて、建物は何階建てですか?」
What floor is ... located on? で「…は何階に位置していますか?」
how many stories is ...? で「…は何階建てですか?」と聞けます。
ご参考まで!