If a cylindrical steel material with a length of 1.2 meters and a diameter of 1 decimeter at the bottom is cut into 3 sections on average, how much is the surface area increased?
把一根长1.2米、底面直径1分米的圆柱形钢材平均截成3段，表面积增加了多少？
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">(1/2) ** 2</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">3.14 * (1/4) * 4</gadget>
<output>3.14</output>

<result>3.14</result>