Cut a cylindrical steel with a length of 1.5 meters into 3 sections on average, and the total surface area of the three sections increases by 12.56 square decimeters. It is known that the steel weighs 7.8 kilograms per cubic decimeter. How many kilograms does one section of steel weigh?
把一根长1.5米的圆柱形钢材平均截成3段，三段表面积总和增加了12.56平方分米，已知每立方分米钢重7.8千克，其中一段钢材的重量是多少千克？
<gadget id="calculator">12.56 / 4</gadget>
<output>3.14</output>

<gadget id="calculator">7.8 / 3</gadget>
<output>2.6</output>

<gadget id="calculator">3.14 * 1.5 * 10 * 2.6</gadget>
<output>122.46</output>

<result>122.46</result>