After sawing a cylindrical steel ingot with a length of 5 meters into two parts, the surface area increases by 25.12 square decimeters. What is the volume of this steel ingot in cubic decimeters?
把一根长5米的圆柱形钢锭锯成两段后，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>