cylindrical steel bar with a length of 2 meters is divided into two parts equally, and the surface area is increased by 20 square centimeters. What is the original volume of the steel bar in cubic centimeters?
一根长2米的圆柱形钢材平均分成两段，表面积增加了20平方厘米，原来钢材的体积多少立方厘米．
<gadget id="calculator">20 / 2</gadget>
<output>10</output>

<gadget id="calculator">10 * 2 * 100</gadget>
<output>2_000</output>

<result>2_000</result>