A cuboid is formed by combining 4 cubes of 1 cubic centimeter in volume. What is the largest surface area in square centimetres.
把4个体积为1立方厘米的正方体木块拼成一个长方体．则拼成的长方体的表面积最大是多少平方厘米．
<gadget id="calculator">4 * 1</gadget>
<output>4</output>

<gadget id="calculator">1 * 1</gadget>
<output>1</output>

<gadget id="calculator">4 + 4 + 1</gadget>
<output>9</output>

<gadget id="calculator">9 * 2</gadget>
<output>18</output>

<result>18</result>