Declension

[neon pilot]

When using plural it doesn't matter if the singular is feminine, masculine or neuter. You just use plural declension.

It's das Gebäude in singular btw so it's neuter rather than feminine.

[neon pilot]

I believe the way it works is that you use whatever declension would make sense even if the number wasn't there. So for example:

Nominative plural with definite article: die weißen Gebäude -> die zwei weißen Gebäude
Nominative plural with no article: weiße Gebäude -> zwei weiße Gebäude