If a 2-meter-long cylindrical wood is cut into two sections, the surface area increases by 15.2 square centimeters, what is the cross-sectional area of this wood in square centimeters?
把一根2米长的圆柱形木料截成2段，表面积增加了15.2平方厘米，这根木料的横截面积是多少平方厘米．
<gadget id="calculator">15.2 / 2</gadget>
<output>7.6</output>

<result>7.6</result>