After a cylinder with a base radius of 2 decimeters is cut in half along the diameter, the surface area increases by 48 decimeters squared. What is the volume of the original cylinder in cubic decimeters?
把一个底面半径为2分米地圆柱体沿直径对半切开后，表面积增加48平方分米，那么，原圆柱的体积是多少立方分米．
<gadget id="calculator">2 ** 2</gadget>
<output>4</output>

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

<gadget id="calculator">48 / 2 / 4</gadget>
<output>6</output>

<gadget id="calculator">3.14 * 4 * 6</gadget>
<output>75.36</output>

<result>75.36</result>