What is the surface area of a cuboid with a length of 2 decimeters, a width of 3 decimeters, and a height of 1 decimeter.
一个长2分米、宽3分米、高1分米的长方体的表面积是多少．
<gadget id="calculator">2 * 3</gadget>
<output>6</output>

<gadget id="calculator">2 * 1</gadget>
<output>2</output>

<gadget id="calculator">3 * 1</gadget>
<output>3</output>

<gadget id="calculator">6 + 2 + 3</gadget>
<output>11</output>

<gadget id="calculator">11 * 2</gadget>
<output>22</output>

<result>22</result>