lib/unit_measurements/measurement.rb in unit_measurements-1.3.0 vs lib/unit_measurements/measurement.rb in unit_measurements-1.4.0

@@ -4,9 +4,10 @@
 
 module UnitMeasurements
   class Measurement
     include Formatter
     include Comparison
+    include Arithmetic
 
     CONVERSION_STRING_REGEXP = /(.+?)\s?(?:\s+(?:in|to|as)\s+(.+)|\z)/i.freeze
 
     attr_reader :quantity, :unit