A cylinder with a height of 8 centimeters is cut into two parts along the height, and the surface area increases by 64 square centimeters. What is the original volume of the cylinder in cubic centimeters?
一个高8厘米的圆柱体，沿高平均截成两份，表面积增加了64平方厘米，原来圆柱体积是多少立方厘米．
<gadget id="calculator">64 / 2 / 8 / 2</gadget>
<output>2</output>

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

<gadget id="calculator">3.14 * 4 * 8</gadget>
<output>100.48</output>

<result>100.48</result>