If a cylinder with a base radius of 2.5 cm and a height of 6 cm is cut into two half cylinders along the base diameter, how many square centimeters will the total surface area increase?
把一个底面半径为2.5cm，高为6cm的圆柱，沿底面直径切割成两个半圆柱后，表面积一共增加了多少平方厘米？
<gadget id="calculator">2.5 * 2 * 6 * 2</gadget>
<output>60</output>

<result>60</result>