If the height of a cube increases by 2 decimeters, the surface area increases by 48 square decimeters. What is the surface area of this cube?
一个正方体的高增加2分米，表面积就增加48平方分米．这个正方体的表面积是多少平方分米？
<gadget id="calculator">48 / 2 / 4</gadget>
<output>6</output>

<gadget id="calculator">6 * 6 * 6</gadget>
<output>216</output>

<result>216</result>