If a cylinder with a base area of 12.65cm**2 is cut into two cylinders of the same size, how much does the surface area increase in cm**2?
把一个底面积是12.65cm**2的圆柱切成两个同样大小的圆柱，表面积增加了多少cm**2．
<gadget id="calculator">12.65 * 2</gadget>
<output>25.3</output>

<result>25.3</result>