What is the surface area of three cubes whose sides are 3 cm long to form a cuboid?
将三个棱长为3厘米的正方体拼成一个长方体，表面积是多少．
<gadget id="calculator">3 * 3 * 6 * 3</gadget>
<output>162</output>

<gadget id="calculator">3 * 3 * 4</gadget>
<output>36</output>

<gadget id="calculator">162 - 36</gadget>
<output>126</output>

<result>126</result>