Question: In the postfix expression evaluation example, the two most recent operands are popped when an operator is encountered so that the subexpression can be evaluated.

In the postfix expression evaluation example, the two most recent operands are popped when an operator is encountered so that the subexpression can be evaluated. The first operand popped is treated as the second operand in the subexpression, and the second operand popped is the first. Give and explain an example that demonstrates the importance of this aspect of the solution.

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