If 11 small cubes of 1 cubic centimeter are used to form a cuboid, how much is the surface area reduced?
用11个1立方厘米的小正方体组成一个长方体，表面积减少了多少．
<gadget id="calculator">11 - 1</gadget>
<output>10</output>

<gadget id="calculator">10 * 2</gadget>
<output>20</output>

<gadget id="calculator">1 * 1 * 20</gadget>
<output>20</output>

<result>20</result>