A 3-meter-long cylindrical steel is cut into 3 sections on average, and the surface area increases by 12.56 square centimeters. What is the volume of this steel?
一根3米长的圆柱体钢材平均截成3段，表面积增加了12.56平方厘米，这根钢材的体积是多少．
<gadget id="calculator">12.56 / 4</gadget>
<output>3.14</output>

<gadget id="calculator">3 * 100</gadget>
<output>300</output>

<gadget id="calculator">3.14 * 300</gadget>
<output>942</output>

<result>942</result>