A cylindrical piece of wood with a length of 1 meter is cut into two sections, and the surface area increases by 40 square centimeters. What is the volume of the original wood in cubic centimeters?
一根长1米圆柱木料，把它截成2段，表面积增加了40平方厘米，原来木料的体积是多少立方厘米．
<gadget id="calculator">40 / 2</gadget>
<output>20</output>

<gadget id="calculator">20 * 1 * 100</gadget>
<output>2_000</output>

<result>2_000</result>