Ask HN: Seriously, steelman this please. 7,400 employees at Docusign?

This article did not shock me at all but somehow looking up the numbers on Docusign made me wonder, seriously, and with all due respect: how would you get to 7,400 employees at Docusign? I literally can't do back-of-the-napkin calculations that make it plausible.

https://news.ycombinator.com/item?id=33010050