cylindrical piece of wood has a base area of 6.5 square centimeters. If it is cut into 3 cylinders, how many square centimeters will the surface area of the wood increase?
一根圆柱形木料，底面积是6.5平方厘米，把它截成3段圆柱后，木料的表面积增加了多少平方厘米．
<gadget id="calculator">6.5 * 4</gadget>
<output>26</output>

<result>26</result>