For a cuboid, if the height is increased by 2cm, the volume will increase by 12cm**3; if the length is increased by 2cm, the volume will increase by 16cm**3; if the width is increased by 2cm, the volume will increase by 24cm**3. What is the surface area of this cuboid.
一个长方体，如果把高增加2cm，体积就增加12cm**3；如果把长增加2cm，体积就增加16cm**3；如果把宽增加2cm，体积就增加24cm**3．这个长方体的表面积是多少．
<gadget id="calculator">6 + 8 + 12</gadget>
<output>26</output>

<gadget id="calculator">26 * 2</gadget>
<output>52</output>

<result>52</result>