Find the surface area of a cuboid whose length is 12 cm and whose width and height are both 5 cm.
求长为12厘米，宽和高都是5厘米的长方体的表面积．
<gadget id="calculator">12 * 5</gadget>
<output>60</output>

<gadget id="calculator">5 * 5</gadget>
<output>25</output>

<gadget id="calculator">60 + 60 + 25</gadget>
<output>145</output>

<gadget id="calculator">145 * 2</gadget>
<output>290</output>

<result>290</result>