You can use dc, a reverse-polish notation calculator, or bc, an entire scripting language for math.
您可以使用dc（这是一种逆波兰式计算器），或者 bc（这是一种用于数学运算的完整的脚本编程语言）。
Postfix notation is also known as reverse Polish notation (RPN) and is commonly used because it enables easy evaluation of expressions.
后缀表示法也称逆波兰表示法(reverse Polish notation,RPN)，因其使表达式求值变得轻松，所以被普遍使用。
Postfix notation is also known as reverse Polish notation (RPN) and is commonly used because it enables easy evaluation of expressions.
后缀表示法也称逆波兰表示法(reverse Polish notation,RPN)，因其使表达式求值变得轻松，所以被普遍使用。
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