By default when calculating large numbers using the calculator widget, a space is used as thousands separator. While helpful visually, most software breaks when entering a number like this (including Kagi), meaning I have to manually get rid of these spaces.
A solution to this would be to keep the thousands separators, but to not copy them when the user copies the result. WolframAlpha has implemented this in the same way: copying 10 000
puts 10000
on my clipboard.