A cylindrical steel with a length of 1.5 meters is cut into 2 equal sections, and the surface area increases by 1.6 square decimeters. What is the original volume of this steel in cubic decimeters?
一根长1.5米的圆柱形钢材，截成相等的2段后，表面积增加1.6平方分米，这根钢材原来的体积是多少立方分米？
<gadget id="calculator">1.6 / 2</gadget>
<output>0.8</output>

<gadget id="calculator">1.5 * 10</gadget>
<output>15</output>

<gadget id="calculator">0.8 * 15</gadget>
<output>12</output>

<result>12</result>