A cylindrical wood with a base radius of 2 decimeters and a length of 5 meters is sawn into three cylindrical woods of different sizes. How much does the sum of the surface areas of the three pieces of wood increase compared to the surface area of the original large column of wood?
把一个底面半径是2分米，长5米的圆柱形木材锯成三个大小不同的圆柱形木材．这三块木材的表面积之和比原来大圆柱木材的表面积增加了多少？
<gadget id="calculator">2 ** 2</gadget>
<output>4</output>

<gadget id="calculator">3.14 * 4 * 4</gadget>
<output>50.24</output>

<result>50.24</result>