It is really convenient to have 1/x function in the regular calculator. Whatever is the current input or result, it should make the reciprocal of it! Many times we ( not so mathy guys😋 ) do division reversely. Now, Once we realize this we have to re enter the whole thing. 1/x would be so cool here.
Though 1/ x is there in scientific view of calc, it is slightly different. It expects us to think before!
