The surface of a large cube of wood is covered with red paint. After cutting it into small cubes with side lengths of 1 cm, only one of the six sides is unpainted. What is the surface area of this big cube of wood in square centimeters?
一个大正方体木块表面涂满了红漆，把它全部切成棱长1厘米的小正方体以后，6个面上都没有漆的只有1块，这个大正方体木块的表面积是多少平方厘米？
<gadget id="calculator">3 * 3 * 6</gadget>
<output>54</output>

<result>54</result>