If a cylinder with a base radius of 10 cm and a height of 15 cm is cut into two cylinders with the same base, what is the increase in surface area in square centimetres?
将一个底面半径为10厘米，高为15厘米的圆柱切成两个与原底面相同的圆柱，表面积增加了多少平方厘米．
<gadget id="calculator">10 ** 2</gadget>
<output>100</output>

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

<result>628</result>