A cylinder with a height of 6 decimeters is cut vertically along the diameter of the bottom surface, and divided into two halves on average, and the surface area increases by 48 square decimeters. What is the volume of this cylinder in cubic decimeters?
把一个高是6分米的圆柱，沿着底面直径竖直切开，平均分成两半，表面积增加48平方分米．原来这个圆柱的体积是多少立方分米？
<gadget id="calculator">48 / 2 / 6</gadget>
<output>4</output>

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

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

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

<result>75.36</result>