def paddings(number_size)
      left_padding = internal_padding = right_padding = ''
      if padded?
        left_padding_size, internal_padding_size, right_padding_size = padding.padding_sizes(number_size)
        right_padding_size = right_padding_size/fill.size
        right_padding = fill*right_padding_size
        d = right_padding_size - right_padding.size
        left_padding_size = (left_padding_size + d)/fill.size
        left_padding = fill*left_padding_size
        internal_padding_size = internal_padding_size/fill.size
        internal_padding = fill*internal_padding_size
      end
      [left_padding, internal_padding, right_padding ]
    end
def paddings(number_size)
      left_padding = internal_padding = right_padding = ''
      if padded?
        left_padding_size, internal_padding_size, right_padding_size = padding.padding_sizes(number_size)
        right_padding_size = right_padding_size/fill.size
        right_padding = fill*right_padding_size
        d = right_padding_size - right_padding.size
        left_padding_size = (left_padding_size + d)/fill.size
        left_padding = fill*left_padding_size
        internal_padding_size = internal_padding_size/fill.size
        internal_padding = fill*internal_padding_size
      end
      [left_padding, internal_padding, right_padding ]
    end
Returns left, internal and right padding for a number
 of given size (number of characters)