If a cylindrical block with a base diameter of 6 cm is cut into two cylindrical blocks of different sizes, how much will the surface area increase?
底面直径是6厘米的圆柱形木块，如果切成大小不等的两个圆柱形木块，表面积增加了多少．
<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>