There is a cube whose surface area is 18 square decimeters. If two such cubes are put together to form a large cuboid, what is the surface area?
有一个正方体，它的表面积是18平方分米，两个这样的正方体拼成一个大长方体，表面积是多少．
<gadget id="calculator">18 / 6</gadget>
<output>3</output>

<gadget id="calculator">6 * 2</gadget>
<output>12</output>

<gadget id="calculator">12 - 2</gadget>
<output>10</output>

<gadget id="calculator">3 * 10</gadget>
<output>30</output>

<result>30</result>