The circumference of the base of a cylinder is 6.28 centimeters. After cutting it into an approximate cuboid, the surface area increases by 48 square centimeters. Find the volume of the original cylinder?
一个圆柱的底面周长是6.28厘米，把它切拼成一个近似的长方体后，表面积增加了48平方厘米．求原来圆柱的体积？
<gadget id="calculator">6.28 / 3.14 / 2</gadget>
<output>1</output>

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

<gadget id="calculator">48 / 2 / 1</gadget>
<output>24</output>

<gadget id="calculator">3.14 * 1 * 24</gadget>
<output>75.36</output>

<result>75.36</result>