Tarea 7

 CCCIVIII

            +        MDCIXVI                      

         XXVIII                                                    --------------
+        CLXV                                                     MCDCCCXIIIIX       
       CLXXVXIII   




         XXVIII                                                CCXCIX                 DCCXIVIII
+      LXXIII                                          +CDXXXVIII              +MCDXXXVI
      --------------                                 -------------------           -------------------
      LXXXXXI                                     DCXXXCXXVII         MCMCXCXXXIIXV