Google is now showing the formula used for calculating some conversions and other math problems in search. Do a search for [10 pounds to kg] or something similar and you will see a “formula” section under the answer that says “for an approximate result, divide the mass value by 2.205.”

Here is a screen shot on desktop:

Sergey Alakov spotted this and posted more examples on Twitter:

This somewhat reminds me of Bing Camera that solves math but way dumbed down.

Forum discussion at Twitter.