A cuboid of 9 decimeters long, 3 decimeters wide and 3 decimeters high is shortened by 2 decimeters along the length, how much is its surface area reduced by how many square decimeters
一根长9分米，宽和高都是3分米的长方体木料，沿长锯短2分米，它的表面积减少多少平方分米
<gadget id="calculator">2 * 3 * 2</gadget>
<output>12</output>

<gadget id="calculator">12 + 12</gadget>
<output>24</output>

<result>24</result>