A cylindrical piece of wood has a base diameter of 0.4m and a length of 3m. Cut into 5 pieces on average, how many square meters will the surface area of these woods increase compared with the original woods?
一根圆柱形木料的底面直径是0.4m长3m．平均切成5段，这些木料的表面积比原木料增加多少平方米？
<gadget id="calculator">0.4 / 2</gadget>
<output>0.2</output>

<gadget id="calculator">0.2 ** 2</gadget>
<output>0.04</output>

<gadget id="calculator">4 * 2</gadget>
<output>8</output>

<gadget id="calculator">3.14 * 0.04 * 8</gadget>
<output>1.0048</output>

<result>1.0048</result>