This is the converter to reverse polish notation (RPN) and it can calculate the expression with "()".
It is an ideal tool to answer alignment of question of converting to RPN.
It is also recommended for people who want to do a simple calculation with "()".
Reverse Polish notation (RPN) is a mathematical notation in which every operator follows all of its operands, in contrast to Polish notation, which puts the operator in the prefix position.
This app can convert from default expression (infix notation) to reverse polish notation.