code: public double transformNumber(double number) {
          if (ruleSet == null) {
              return number / divisor;
          } else {
              return Math.floor(number / divisor);
          }
      }
docs: Divides the number by the rule's divisor and returns the quotient.
  This is an integral quotient if we're filling in the substitution
  using another rule set, but it's the full quotient (integral and
  fractional parts) if we're filling in the substitution using
  a DecimalFormat.  (This allows things such as "1.2 million".)
  @param number The number being formatted
  @return "number" divided by the rule's divisor