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I am looking for assistance again.

Is there a math modeling program out there or something similar that will allow very large numbers and is easy to manipulate without knowing a coding language?

Thank you.

So I couldn't think of anything besides MatLab, which I used decades ago in university, but a quick google turned up some tools on the NCTM website, mostly designed for high school. Once on the site, search 'core math tools'. I don't know if any of them will do what you want, but they look like they might be interesting. (On my phone, so I can't even try them.)

R and Octave are up and coming alternatives to matlab.

Also, many programming languages have 'big number' libraries to allow arbitrary precision.

Has he ever looked at Wolfrom Alpha? http://www.wolframalpha.com/ It can do lots of fun with math. When I was younger I used to play with Mathematica. (Software for modeling in math) Wolfrom Alpha is the company that makes Mathematica but they have a web-site that allows you to do a lot of fun stuff for free.

I was going to mention wolfram alpha as well. Another free tool that's fairly popular is desmos. Its mainly used for graphing but has enough precision for sure for your requirements. Also in real life what I actually use for lots of larger calculations is python. You can type basic expressions in a basically natural notation so its not too hard despite being a programming language.

Opps.. that was from another post.

My husband is a mathematician. I asked him this question and he also recommends starting with Wolfram Alpha because it's "free, online, has support for arbitrarily large numbers and is good for symbolic math (Matlab and R are not)." The only other alternative he can think of is sympy, which can be found at www.sympy.org