Most of the time, storing calculations is ill advised, for if one value changes you will likely not remember to force a recalc, and there's nothing in Access that will pick up the need.
One option is to replicate the math in Access if the calc isn't too onerous. A Combinations or Permutations would be doable, for example, but you could research whatever the calculation is and see if you can replicate it. The most difficult one I've ever done is the volume of liquid in a cylindrical horizontal tank, based on depth readings.
I do recall one instance of where I was able to use an Excel feature from Access as long as I had the necessary library referenced, plus made a connection to Excel. I can't recall what it was about because I was only playing around, but the point is, I was able to make use of an Excel function from Access.
Again, storing calculations is seldom a good idea. I suppose you could make it so that all calcs/recalcs are done in the worksheet and only link to that from Access. I wish I could say for certain that all you need to do is refer to the calculated cell without having to copy the result to another sheet, but I'm retired now and things are getting fuzzier.
The more we hear silence, the more we begin to think about our value in this universe.
Paraphrase of Professor Brian Cox.