A cylindrical steel bar, 2 meters long. If it is cut into 3 sections, the surface area will increase by 12.56 square centimeters. What is the volume of this steel in cubic centimeters?
一个圆柱形钢材，长2米．如果把它截成3段，表面积就增加12.56平方厘米，这个钢材的体积是多少立方厘米．
<gadget id="calculator">3 - 1</gadget>
<output>2</output>

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

<gadget id="calculator">12.56 / 4</gadget>
<output>3.14</output>

<gadget id="calculator">2 * 100</gadget>
<output>200</output>

<gadget id="calculator">3.14 * 200</gadget>
<output>628</output>

<result>628</result>