If a cylinder with a base diameter of 8 cm is cut into 3 segments, how much does the surface area increase in square centimeters?
将一个底面直径是8厘米的圆柱体，截成3段，表面积增加多少平方厘米．
<gadget id="calculator">8 / 2</gadget>
<output>4</output>

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

<gadget id="calculator">3.14 * 16 * 4</gadget>
<output>200.96</output>

<result>200.96</result>