The best way to learn proper English is to read news report, and watch news on TV. Watching TV shows is a great way to learn casual English, slang words, understand culture reference and humor. If you have already watched these shows then you may recall the words used in the following dialogs.

311 MILLION euros!
Money Heist Season 1, Episode 8

I’m going to have
300 MILLION euros, right?
Money Heist Season 1, Episode 1

-15 MILLION euros.
-I can sign it on paper if you want.
Money Heist Season 1, Episode 9

♪ I've spent a MILLION lifetimes
Loving the same man ♪
Breaking Bad Season 4, Episode 7

Eighty MILLION.
Breaking Bad Season 5, Episode 14