If two cubes with side lengths of 5 cm are put together to form a cuboid, does the surface area change? How much has it changed?
把两个棱长是5厘米的正方体拼成一个长方体，表面积有变化吗？变化了多少？
<gadget id="calculator">5 * 5 * 2</gadget>
<output>50</output>

<result>50</result>