<image>There's a game called "24 points" with the following rules: Pick any four natural numbers between 1 and 13, and use these four numbers (each number can only be used once) in addition, subtraction, multiplication, and division operations to make the result equal to 24. Form 24 using the following four playing cards, the result is ____=24.
(Note: Q represents 12, K represents 13.)
