The length, width, and height of a cuboid block are 6 cm, 4 cm, and 5 cm respectively. A largest cylinder is cut out of the block. What is the volume of the cylinder?
一个长方体木块的长、宽、高分别是6厘米、4厘米、5厘米，在这个木块上削出一个最大的圆柱，这个圆柱的体积是多少．
<gadget id="calculator">5 / 2</gadget>
<output>5/2 = around 2.5</output>

<gadget id="calculator">(5/2) ** 2</gadget>
<output>25/4 = around 6.25</output>

<gadget id="calculator">3.14 * (25/4) * 4</gadget>
<output>78.5</output>

<result>78.5</result>