If two cubes with side lengths of 10 cm are put together to form a cuboid, what is the reduction in surface area in square centimetres?
将两个棱长为10厘米的正方体拼成一个长方体，表面积减少多少平方厘米．
<gadget id="calculator">10 * 10 * 2</gadget>
<output>200</output>

<result>200</result>