If two cubes with side lengths of 2 cm are put together to form a cuboid, what is the reduction in surface area in square centimetres?
把2块棱长都为2厘米的正方体拼成一个长方体，表面积减少了多少平方厘米．
<gadget id="calculator">2 * 2 * 2</gadget>
<output>8</output>

<result>8</result>