They want three more chairs.
Necesitan otras tres sillas.
Note.—Observe the position of otras. The word otro regularly precedes a numeral.
99. In the conjunctive phrase either ... or, either is translated o. As a pronoun it is translated o el uno o el otro. At the end of a negative sentence either is rendered tampoco.
Either I'm much mistaken or this is going to cause talk.
O me engaño mucho o esto va a dar que hablar.
—EMILIA PARDO BAZÁN.
Do you want this pen or the fountain pen? Either will do.
¿Quiere Vd. esta pluma o la plumafuente?—O la una o la otra servirá.
And I don't think I'm a fool, either.