A 5-meter cylindrical steel ingot is cut into two small cylinders, and the surface area increases by 25.12 square decimeters. What is the volume of this steel ingot in cubic decimeters?
把一根5米的圆柱形钢锭截成两个小圆柱，表面积增加了25.12平方分米，这根钢锭的体积是多少立方分米．
<gadget id="calculator">25.12 / 2</gadget>
<output>12.56</output>

<gadget id="calculator">5 * 10</gadget>
<output>50</output>

<gadget id="calculator">12.56 * 50</gadget>
<output>628</output>

<result>628</result>