_RatioZeroDenominator ≡ _ArithException . _RatioZeroDenominator
_RatioZeroDenominator :: Prism' ArithException ArithException _RatioZeroDenominator :: Prism' SomeException ArithException
>>> import Numeric.Decimal >>> :set -XDataKinds -XTypeApplications >>> decimalDenominator <$> arithD @RoundHalfEven @3 @Int 123.45 Arith 1000