If a cylinder with a base radius of 8 cm and a height of 12 cm is cut and assembled into an approximate cuboid, how much does its surface area increase compared to the original one?
把一个底面半径是8厘米，高是12厘米的圆柱切拼成一个近似的长方体，它的表面积比原来增加了多少．
<gadget id="calculator">12 * 8 * 2</gadget>
<output>192</output>

<result>192</result>