I just tried it again in RPN mode on realcalc  and if I leave out the final
ENTER from  Dwayne's example  I get one.
It makes sense as the 2 is in the X register and pressing enter will push a
copy into the stack.

Just to confirm I dug out my HP16C and tried both methods.
Dwayne's gives 0.5 but without the final ENTER it gives 1.

Is there a difference in RPN implementations at play here?
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