Sentence

二の二倍は四。

()()(ばい)(よん)
Twice two is equal to four.
Sentence

彼は私の倍食べた。

(かれ)(わたし)(ばい)()べた。
He ate twice as much as I did.
Sentence

8は4の2倍です。

8は4の2(ばい)です。
Eight is the double of four.
Sentence

2の2倍は4です。

2の2(ばい)は4です。
Twice two is four.
Sentence

彼は私の三倍も稼ぐ。

(かれ)(わたし)(さん)(ばい)(かせ)ぐ。
He earns three times as much as I.
Sentence

倍付けで払いますよ。

倍付(ばいづ)けで(はら)いますよ。
I'll pay double the price.
Sentence

僕の蔵書は彼の二倍だ。

(ぼく)蔵書(ぞうしょ)(かれ)()(ばい)だ。
I have twice as many books as he.
Sentence

僕の収入は君の2倍だ。

(ぼく)収入(しゅうにゅう)(きみ)の2(ばい)だ。
My income is twice as large as yours is.
Sentence

彼の収入は私の3倍だ。

(かれ)収入(しゅうにゅう)(わたし)の3(ばい)だ。
His income is three times larger than mine.
Sentence

君の収入は私の3倍だ。

(きみ)収入(しゅうにゅう)(わたし)の3(ばい)だ。
Your income is three times larger than mine.