While performing a matrix multiplication on my scientific calculator (CASIO fx-991ES PLUS), I realized that the calculator gives out the answers in decimals (approx. decimals in case of irrational answers) even if I enter the numbers in fractional forms myself. Is there some way in which I can command my calculator to stop doing this?
For e.g., let's say some of my entries in the matrices to be multiplied are irrational numbers like $\sqrt{2}$, then as soon as I enter it, the calculator approximates it to 1.414213562 and then in the final product matrix all entries are turned into decimals from where I can't exactly find what the entry really is, say if some entry in final product matrix is 0.2828427125, then its hard to conclude that in irrational fractional form, the number actually approximates $\sqrt{2}/5$.
I need the latter because sometimes situations demand the same.
Though it seems that I'm expecting too much from life but still, is there some way I can make the calculator stop converting the input entries into decimals in the very first place ( because getting an irrational number from a non-terminating decimal is obviously not possible, so what if the calculator computes everything i.e., numerator and denominator separately and never perform the division operation throughout the process )
Just in case this isn't the right stack site, please suggest me as I couldn't find any better