A cuboid is 5dm long, 4dm wide, and 8dm high, what is its surface?
一个长方体长5dm，宽4dm，高8dm，它的表面是多少．
<gadget id="calculator">5 * 4</gadget>
<output>20</output>

<gadget id="calculator">5 * 8</gadget>
<output>40</output>

<gadget id="calculator">4 * 8</gadget>
<output>32</output>

<gadget id="calculator">20 + 40 + 32</gadget>
<output>92</output>

<gadget id="calculator">92 * 2</gadget>
<output>184</output>

<result>184</result>