If a 2-meter-long cylindrical stick is sawn into three pieces, the surface area increases by 12 square decimeters. What is the original volume of the stick?
把2米长的圆柱形木棒锯成三段，表面积增加了12平方分米，原来木棒的体积是多少．
<gadget id="calculator">3 - 1</gadget>
<output>2</output>

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

<gadget id="calculator">12 / 4</gadget>
<output>3</output>

<gadget id="calculator">3 * 2 * 10</gadget>
<output>60</output>

<result>60</result>