Each edge of a cube has length 3 inches. What is the number of square inches in the cube's total surface area?
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Each edge of a cube has length 3 inches. What is the number of square inches in the cube's total surface area?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
54
Each edge of a cube has length 3 inches. What is the number of square inches in the cube's total surface area?
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