If a 100 cm long cylindrical stick is cut into two short cylinders, the surface area increases by 16 square centimeters. What is the volume of this cylindrical stick in cubic centimeters?
把一根100厘米长的圆柱形木棍截成两个短圆柱，表面积增加了16平方厘米，原来这根圆柱形木棍的体积是多少立方厘米．
<gadget id="calculator">16 / 2</gadget>
<output>8</output>

<gadget id="calculator">8 * 100</gadget>
<output>800</output>

<result>800</result>