A cylinder with a diameter of 8 cm is divided vertically into two identical pieces along the diameter of the cylinder, increasing the surface area by 112 cm2. Find the volume of this cylinder?
一个圆柱体的直径是8厘米，沿这个圆柱体的直径竖直分成相同的两块，表面积增加了112平方厘米．求这个圆柱体的体积？
<gadget id="calculator">8 / 2</gadget>
<output>4</output>

<gadget id="calculator">4 ** 2</gadget>
<output>16</output>

<gadget id="calculator">112 / 2 / 8</gadget>
<output>7</output>

<gadget id="calculator">3.14 * 16 * 7</gadget>
<output>351.68</output>

<result>351.68</result>