It separates naming from evaluating. I have to bake 7 pies... 7 and each pie takes 45min 7 45 * => 315 But I can fit 3 pies in the oven at a time 7 45 *

It separates naming from evaluating. I have to bake 7 pies... 7 and each pie takes 45min 7 45 * => 315 But I can fit 3 pies in the oven at a time 7 45 * 3 / => 105 Using infix notation, I would need to consider order of operations, and put operators before data, increasing the mental stack size. Using a postfix calculator, I can just throw values onto the stack, and start consolidating them with operations.