If a cube with an edge length of 3 decimeters is cut into two cuboids, what is the increase in surface area by how many square decimeters
把一个棱长是3分米的正方体切成两个长方体，表面积增加了多少平方分米
<gadget id="calculator">3 * 3 * 2</gadget>
<output>18</output>

<result>18</result>