A confusing thing is that the program seems to be using the purescript-quantity library which uses the purescript-decimals library which is arbitrary precision numbers, if I followed the dependencies correctly.
The readme also advertises it can deal with 10^(10^10), which it can (doubles can't deal with this, so it's definitely not just using Javascript doubles). The part which prints out numbers rounds to 6 places, but I don't see any place which rounds intermediate results.
