Microwave Key Press Efficiency Calcualtor
Based on RubyQuiz #118 - Micrrowave Numbers
Examples
calc = MicrowaveKeyPressEfficiency::Calculator.new
99 seconds are the same as 1:39 but is it more effecient? Yes, because 99 is less key presses than 139.
calc.keys_to_press(99) # => 99
71 seconds are equal to 1:11 so here it's more effecient to just press 1 three times instead of 7 and 1.
calc.keys_to_press(71) # => 111