After cutting a 1.5-meter-long cylinder into two small pieces, the surface area increases by 8 square decimeters. What is the original volume of the cylinder?
把一根1.5米长的圆柱切成两小段圆柱后，表面积增加了8平方分米，原来这根圆柱的体积是多少立方分米．
<gadget id="calculator">8 / 2</gadget>
<output>4</output>

<gadget id="calculator">4 * 1.5 * 10</gadget>
<output>60</output>

<result>60</result>