This a RPN calculator (Reverse Polish Notation). Its working like this : If you want to make 3x6 you make 3 —> enter —> 6 —> x First number -> enter -> second number —> operator It Will calculate autommatically Example : <iframe width="1024" height="1586" frameborder="0" loading="lazy" allow="autoplay; fullscreen; picture-in-picture; clipboard-write; web-share" allowfullscreen src="https://commons.wikimedia.org/wiki/File:Typing_the_calculation_for_%228_times_6%22_into_a_pocket_calculator_HP-32SII_which_uses_RPN_logic.webm?embedplayer=true" />
