Cut a 300 cm long cylindrical steel into two sections (each section is still a cylinder), the surface area increases by 18 square centimeters, what is the original volume of this piece of steel in cubic centimeters?
把300厘米长的圆柱形钢材截成2段(每段还是圆柱体)，表面积增加了18平方厘米，这段钢材原来体积是多少立方厘米．
<gadget id="calculator">18 / 2</gadget>
<output>9</output>

<gadget id="calculator">9 * 300</gadget>
<output>2_700</output>

<result>2_700</result>