If a cylinder with a base radius of 10 decimeters is cut into two cylinders of the same size, how much is the surface area increased compared to the original one?
把一个底面半径是10分米圆柱体切成两个同样大小的圆柱，表面积与原来相比增加了多少分米？
<gadget id="calculator">10 ** 2</gadget>
<output>100</output>

<gadget id="calculator">3.14 * 100 * 2</gadget>
<output>628</output>

<result>628</result>