The bottom area of a cylindrical wood is 12.56cm**2, and the side area is 125.6cm**2. According to the next section, the surface of the original cylinder will be reduced by how much cm**2.
一根圆柱形木料的底面积是12.56cm**2，侧面积是125.6cm**2，据下一节长5cm的圆柱后，原来圆柱的表面会减少多少cm**2．
<gadget id="calculator">3.14 * 2 * 2 * 5</gadget>
<output>62.8</output>

<result>62.8</result>