A cylinder whose base area is 50.24 cm in circumference and 9 cm in height is cut into two half cylinders of the same size along the height, how much does the surface area increase?
一个底面积周长50.24厘米，高9厘米的圆柱，沿着高切成两个同样大小的半圆柱体，表面积增加了多少？
<gadget id="calculator">50.24 / 3.14</gadget>
<output>16</output>

<gadget id="calculator">16 * 9 * 2</gadget>
<output>288</output>

<result>288</result>