If a cube with a side length of 3 decimeters is cut into two equal cuboids, what is the total area of the two added faces?
把一个棱长3分米的正方体，切成两个相等的长方体，增加的两个面的总面积是多少平方分米．
<gadget id="calculator">3 * 3 * 2</gadget>
<output>18</output>

<result>18</result>