Cut a 4-meter-long cylindrical steel into three shorter cylinders, and its surface area increases by 24 square decimeters. What is the original volume of this steel?
将一根长4米的圆柱形钢材截成三段较短的圆柱形，其表面积增加了24平方分米，这根钢材原来的体积是多少？
<gadget id="calculator">24 / 4 / 100</gadget>
<output>3/50 = around 0.06</output>

<gadget id="calculator">(3/50) * 4</gadget>
<output>6/25 = around 0.24</output>

<result>6/25 = around 0.24</result>