If a cylindrical steel material with a length of 2 meters and a diameter of 8 cm at the bottom is cut into 4 small cylinders, what is the increase in the surface area in square centimeters?
把一根长2米、底面直径8厘米的圆柱形钢材截成4个小圆柱，表面积增加多少平方厘米．
<gadget id="calculator">8 / 2</gadget>
<output>4</output>

<gadget id="calculator">4 ** 2</gadget>
<output>16</output>

<gadget id="calculator">3.14 * 16 * 6</gadget>
<output>301.44</output>

<result>301.44</result>