numeral datatypes for PostgreSQL

 This module provides numeric data types for PostgreSQL that use
 numerals (words instead of digits) for input and output.
 .
  * numeral: English numerals (one, two, three, four, ...),
    short scale (10^9 = trillion)
  * zahl: German numerals (eins, zwei, drei, vier, ...),
    long scale (10^9 = Milliarde)
  * roman: Roman numerals (I, II, III, IV, ...)