Measurement.define(:'cm³') do |unit|
  unit.alias :cm3, :'cm^3', :'cm*cm*cm', :'cubic centimeter', :'cubic centimeters'
  unit.convert_to(:m3) { |value| value / 1_000_000.0 }
  unit.convert_to(:dm3) { |value| value / 1_000.0 }