A steel cylinder with a length of 2 meters is cut into two small cylinders of equal length. The surface area is increased by 30 square centimeters compared to the original one. What is the volume of the original cylinder?
一根长2米的圆柱体的钢材，把它切成两段等长的小圆柱体，表面积比原来增加了30平方厘米，原来圆柱钢材的体积是多少．
<gadget id="calculator">30 / 2</gadget>
<output>15</output>

<gadget id="calculator">15 * 2 * 100</gadget>
<output>3_000</output>

<result>3_000</result>