cuboid becomes a cube if its height increases by 3 cm, and its surface area increases by 48 cm**2, what is the volume of the original cuboid?
一个长方体，如果高增加3厘米就变成了正方体，而且表面积也增加了48cm**2，则原来的长方体的体积是多少．
<gadget id="calculator">48 / 3 / 4</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>