It’s on the New York Times website, desktop mode or app only.

They must mean reddit, even though orange isn’t really a primary color of the website itself.

It seems like it really caught on with the Instagram demographic, since they auto enrolled you into threads if you have an IG.

Realistically, you would just write root 7 as a coefficient of your answer if you’re performing this math long hand. No one really expects anyone to be able to calculate things like that.