I wrote a C program (6 years ago...) that does add/sub/mul/div with any number of digits in the operands (the maximum number of digits is actualy defined as a constant in code).
It operates with integers only, but I believe you can add 34 zeros to the divider (?, I mean first operand) you get the figures - without the decimal sign. Or, you could use the code to add the decimal capability.
I don't know if this is something to upload, but I can send you the C source code if you are interested.

>Thanks for the info. I figured I may have to roll my own but was hoping someone had tackled this already. Our client wants to be able to divide and multiply numbers that have 34 or 38 numbers after the decimal with results that also display that many.
>
>-Regards!