Преобразовать формулу так, чтобы знак отрицания был отнесен только к переменным:

   21 324    :  37                                           216724     : 42

     185                                             210           

            576 ( остача 12)                       516( в остатку 4) 

        282                                                             67

        259                                                             42

          234                                                           252

          222                                                           252

            12                                                                 4

     21 324    :  37                                           216724     : 42

     185                                             210           

            576 ( остача 12)                       516( в остатку 4) 

        282                                                             67

        259                                                             42

          234                                                           252

          222                                                           252

            12                                                                 4