For a cylinder, if the height is reduced by 2 cm, the surface area will be reduced by 25.12 cm2, and the volume will be reduced by (1/5). What is the original volume of the cylinder in cubic centimeters?
一个圆柱，如果高减少2厘米，表面积就减少25.12平方厘米，体积减少(1/5)．这个圆柱原来的体积是多少立方厘米？
<gadget id="calculator">25.12 / 2 / 3.14 / 2</gadget>
<output>2</output>

<gadget id="calculator">2 ** 2</gadget>
<output>4</output>

<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">2 / (1/5)</gadget>
<output>10</output>

<gadget id="calculator">3.14 * 4 * 10</gadget>
<output>125.6</output>

<result>125.6</result>