Trying to adjust precision and significant digits.

I need help using this HugeLib module for math class. I have the Gold edition and I have seen the HugeLib file on my computer but I just don't understand how to implement the code. Do you have any sample code for using HugeLib? I can not find the right documents to implement this. I need to adjust the number of significant digits for calculations and I believe it's possible. The only handbook I have available is the silver edition one and it doesn't say how to use the library. How do I implement the library, and then once implemented, where are the instructions for using HugeLib to adjust calculation precision?

Thanks.