If a 2-meter-long cylindrical wood is cut into 3 sections, the surface area increases by 30.4 square centimeters, what is the cross-sectional area of this wood?
把一根2米长的圆柱形木料截成3段，表面积增加了30.4平方厘米，这根木料横截面的面积是多少．
<gadget id="calculator">30.4 / 4</gadget>
<output>7.6</output>

<result>7.6</result>