If a cone with a base circumference of 12.56 cm and a height of 6 cm is cut into two identical shapes along the diameter of the base, how much does the surface area increase in square centimeters?
把一个底面周长是12.56厘米，高6厘米的圆锥沿底面直径切成两个一样的形体，表面积增加多少平方厘米．
<gadget id="calculator">12.56 / 3.14</gadget>
<output>4</output>

<gadget id="calculator">6 / 2</gadget>
<output>3</output>

<gadget id="calculator">4 * 3 * 2</gadget>
<output>24</output>

<result>24</result>