When the height of a cuboid is reduced by 2 decimeters, the surface area is reduced by 24 square meters and becomes a cube. What is the surface area of the cube?
一个长方体的高减少2分米后，表面积就减少24平方米，成为一个正方体，这个正方体的表面积是多少．
<gadget id="calculator">60 / 2</gadget>
<output>30</output>

<gadget id="calculator">30 * 30 * 6</gadget>
<output>5_400</output>

<result>5_400</result>