So this is a REEEEEALLY simple version, I think with SVG for sections and correct positioning you could do this, reasonably easy?
You can hover over top left pie section, or section 1 text to see.
http://magicians-sandbox.webflow.io/3-141592654
https://preview.webflow.com/preview/magicians-sandbox?preview=454975d6856e10b34ae69debfe0f883f
(choose 3.141592654 (Pi) page. See what I did there? 
)
There is also a CodePen I found, which could be easily styled to match your site with some basic css styling (just editing what’s already there)
Or something slightly different is this cool pie chart by @DigtalCrusader
https://webflow.com/website/Animated-Pie-Graph