code: private boolean checkFiVatId(final String pvatId) {
      final int checkSum = pvatId.charAt(9) - '0';
      final int sum =
          (pvatId.charAt(2) - '0') * 7 + (pvatId.charAt(3) - '0') * 9 + (pvatId.charAt(4) - '0') * 10
              + (pvatId.charAt(5) - '0') * 5 + (pvatId.charAt(6) - '0') * 8
              + (pvatId.charAt(7) - '0') * 4 + (pvatId.charAt(8) - '0') * 2;
      final int calculatedCheckSum = MODULO_11 - sum % MODULO_11;
      return checkSum == calculatedCheckSum;
    }
docs: check the VAT identification number, country version for Finland.
  
  @param pvatId vat id to check
  @return true if checksum is ok