A cylinder is 8 cm high. If it is cut in half along its height, its surface area will increase by 64 cm2. Find the volume of the original cylinder.
一个圆柱高8厘米，如果沿着它的高平均切成两半后，它的表面积增加64平方厘米，求原来圆柱的体积．
<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>