If a cone has a base diameter of 8 cm and a height of 12 cm, if it is cut into two equal parts along the base diameter, what is the increase in surface area in square centimetres?
一个圆锥的底面直径是8厘米，高12厘米，沿底面直径将它切成两个完全相等的部分，表面积增加多少平方厘米．
<gadget id="calculator">12 / 2</gadget>
<output>6</output>

<gadget id="calculator">8 * 6 * 2</gadget>
<output>96</output>

<result>96</result>