If two cubes with side lengths of 3 cm are put together to form a cuboid, what is the surface area in square centimetres?
把棱长是3厘米的两个正方体拼成一个长方体，它的表面积是多少平方厘米．
<gadget id="calculator">3 * 3 * 10</gadget>
<output>90</output>

<result>90</result>