Understanding infix to prefix conversion

Any expression written in the prefix notation can be easily parsed and evaluated by a computer as opposed to the infix notation. However, for us humans, writing prefix expressions is very difficult and error-prone as we are not used to it. However, we can convert an expression written in the infix notation to a prefix using the infix-to-prefix conversion algorithm.

To keep things simple, consider the example of an infix notation without parentheses given below.