Draw three line segments from the vertices of a cuboid, which are 2.5 cm, 4 cm, and 2 cm. What is the surface area of the cuboid?
从一个长方体的顶点引出三条线段，分别是2.5厘米，4厘米，2厘米，这个长方体的表面积是多少．
<gadget id="calculator">2.5 * 4</gadget>
<output>10</output>

<gadget id="calculator">2.5 * 2</gadget>
<output>5</output>

<gadget id="calculator">4 * 2</gadget>
<output>8</output>

<gadget id="calculator">10 + 5 + 8</gadget>
<output>23</output>

<gadget id="calculator">23 * 2</gadget>
<output>46</output>

<result>46</result>