If a square hole with a side length of 2 cm is punched in the center of the upper, right, and front faces of a cube with an edge length of 9, what is the surface area in square centimeters?
在一个棱长为9的正方体的上、右、前三个面的中心，分别打一个边长为2厘米的正方形孔，则其表面积是多少平方厘米？
<gadget id="calculator">9 * 9 * 6</gadget>
<output>486</output>

<gadget id="calculator">2 * 2 * 4 * 3</gadget>
<output>48</output>

<gadget id="calculator">486 + 48</gadget>
<output>534</output>

<result>534</result>