- The BBP can give the nth hexadecimal digit, which doesn't easily correspond to a decimal digit
- You should read over the Wikipedia article rather than just blindly copying formulas. The article literally details steps to solve some of the problems you are having.
- Your calculator is probably crashing because of an ERR:OVERFLOW from the $16^k$ factor; the max allowed
*k*is 80.

But, every time I try to type this in, my calculator crashes. Is there any other way simpler to accomplish this?

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