BigDecimal
Inherits Unit::AllNumericExtensions < Unit::Density::NumericExtensions < Unit::Volume::NumericExtensions < Unit::Length::NumericExtensions < Unit::Weight::NumericExtensions < Comparable < Comparable < Comparable < Comparable < Number < Comparable < Steppable < Comparable < Value < Object
A BigDecimal can represent arbitrarily large precision decimals.
It is internally represented by a pair of BigInt and UInt64: value and scale.
Value contains the actual value, and scale tells the decimal point place.
E.g. when value is 1234 and scale 2, the result is 12.34.
NOTE: To use BigDecimal, you must explicitly import it with require "big"
The general idea and some of the arithmetic algorithms were adapted from the MIT/APACHE-licensed bigdecimal-rs.