The radius of the bottom surface of a cylindrical log is 0.2 meters, and the length is 3 meters. If it is cut into 3 sections, how many square meters will the surface area of these logs increase compared with the original log?
一根圆柱形木料的底面半径是0.2米，长是3米，将它截成3段，这些木料的表面积比原木料增加了多少平方米？
<gadget id="calculator">0.2 ** 2</gadget>
<output>0.04</output>

<gadget id="calculator">3.14 * 0.04 * 4</gadget>
<output>0.5024</output>

<result>0.5024</result>