Code on the Bento Wrapping Paper at RubyKaigi 2016

esm_bento.rb

                eval(
               %w( put
             s(([   2*7,
            2*31     ,1,3
           *3*5       ,2*2
          *2*2          *3].
         map{            |c|c
        .to_          s(5*7
       ).gs        ub("1    ","
      \s")      .upca        se}.
     zip(     [2*5*           61*1
    801,    2*5*3              931,
   811*   1871,                 2*11
  *350  27,7*                    11*1
 259* 20389                       *764
171].map{|c|c.to_s(2*2*3*3)}))*""))*"")