If a cylinder with a base area of 157 square centimeters is cut into two cylinders of the same size, how much does the surface area increase?
把一个底面积是157平方厘米的圆柱切成两个同样大小的圆柱，表面积增加了多少．
<gadget id="calculator">157 * 2</gadget>
<output>314</output>

<result>314</result>