If a cylinder is cut into two small cylinders, the surface area will increase by 6.28 square centimeters. If it is cut along the diameter and height, the surface area will increase by 10 square centimeters. What is the volume of the original cylinder in cubic centimeters?
一个圆柱体，如果裁成两个小圆柱体，则表面积增加6.28平方厘米，如果沿直径和高切开，则表面积增加10平方厘米，原来圆柱体的体积是多少立方厘米．
<gadget id="calculator">6.28 / 2</gadget>
<output>3.14</output>

<gadget id="calculator">3.14 / 3.14</gadget>
<output>1</output>

<gadget id="calculator">1 * 1 * 2</gadget>
<output>2</output>

<gadget id="calculator">10 / 2 / 2</gadget>
<output>5/2 = around 2.5</output>

<gadget id="calculator">3.14 * (5/2)</gadget>
<output>7.85</output>

<result>7.85</result>