>>9
Clarification: You can't get more digits of precision when using multiplicative methods. If you
added numbers together, then extra digits of precision can be achieved eventually. For example:
9.8 x 9.8 = 96. = 2 digits of precision
9.8 + 9.8 = 19.6 = 3 digits of precision
Note also that the LEAST NUMBER of digits of precision governs the reported result. If you multiply a 2-digit number by a 4-digit number, the result should be reported to only 2 digits of precision (unless the 2-digit number is exact).
Google "significant digits" for more information.