If a cube with side length 3cm is cut into two cuboids, how much is the surface area increased in C㎡
把一个棱长是3cm的正方体，截成两个长方体，表面积增加了多少C㎡
<gadget id="calculator">3 * 3 * 2</gadget>
<output>18</output>

<result>18</result>