If a cylindrical piece of wood has a base area of 8dm**2, if it is cut into two small cylinders, how much will the surface area increase by dm**2?
一根圆柱形木料，底面积是8dm**2，把它截成2个小圆柱，表面积增加多少dm**2．
<gadget id="calculator">8 * 2</gadget>
<output>16</output>

<result>16</result>