A cuboid becomes a cube if its height is reduced by 4 centimeters. At this time, the surface area is reduced by 112 square centimeters. What is the side area of the original cuboid?
一个长方体，如果高减少4厘米，就变成一个正方体，这时表面积比原来减少112平方厘米，原来长方体的侧面积是多少？
<gadget id="calculator">112 / 4 / 4</gadget>
<output>7</output>

<gadget id="calculator">7 + 4</gadget>
<output>11</output>

<gadget id="calculator">11 * 7 * 4</gadget>
<output>308</output>

<result>308</result>