For a cuboid, if the height increases by 3 decimeters and the length and width remain the same, its surface area increases by 48 square decimeters, and it becomes exactly a cube. What is the volume of this cuboid in cubic decimeters
一个长方体，如果高增加3分米，长和宽不变，它的表面积就增加48平方分米，正好变成一个正方体．原来这个长方体的体积是多少立方分米
<gadget id="calculator">48 / 4 / 3</gadget>
<output>4</output>

<gadget id="calculator">4 - 3</gadget>
<output>1</output>

<gadget id="calculator">4 * 4 * 1</gadget>
<output>16</output>

<result>16</result>