A cylindrical piece of wood is 8m long and the diameter of the bottom circle is 6cm. If it is sawn into two small cylinders of the same length, how many cm does its surface area increase from the original surface area?**2.
一根圆柱形木料，长8m，底面圆的直径是6cm，把它锯成同样长的两个小圆柱，它的表面积比原来的表面积增加了多少cm**2．
<gadget id="calculator">6 / 2</gadget>
<output>3</output>

<gadget id="calculator">3 ** 2</gadget>
<output>9</output>

<gadget id="calculator">3.14 * 9 * 2</gadget>
<output>56.52</output>

<result>56.52</result>