Cut a 1.2-meter cylindrical steel into three sections, and the surface area increases by 6.28 square decimeters. What is the volume of this piece of steel?
把一根1.2米的圆柱体钢材截成3段，表面积增加6.28平方分米．原来这根钢材的体积是多少？
<gadget id="calculator">6.28 / 4</gadget>
<output>1.57</output>

<gadget id="calculator">1.57 * 1.2 * 10</gadget>
<output>18.84</output>

<result>18.84</result>