If the height of a cube increases by 3 decimeters, the surface area increases by 60 square decimeters. What is the surface area of this cube?
一个正方体的高增加3分米，表面积就增加60平方分米．这个正方体的表面积是多少平方分米？
<gadget id="calculator">60 / 3 / 4</gadget>
<output>5</output>

<gadget id="calculator">5 * 5 * 6</gadget>
<output>150</output>

<result>150</result>