If two cubes with side lengths of 5 cm are put together to form a cuboid, what is the reduction in surface area in square centimetres?
棱长是5厘米的两个正方体拼成一个长方体，表面积减少多少平方厘米．
<gadget id="calculator">5 * 5 * 2</gadget>
<output>50</output>

<result>50</result>