If a cube with a surface area of 12 square centimeters is equally divided into two cuboids, what is the increase in the surface area in square centimeters?
把一个表面积是12平方厘米的正方体平均分成两个长方体，表面积增加了多少平方厘米．
<gadget id="calculator">12 / 6</gadget>
<output>2</output>

<gadget id="calculator">2 * 2</gadget>
<output>4</output>

<result>4</result>