If a cuboid with a length of 4 decimeters, a width of 2.5 decimeters and a height of 3 decimeters is cut into the largest cylinder, what is the volume of this cylinder?
把一个长4分米，宽2.5分米，高3分米的长方体削成一个最大的圆柱，这个圆柱的体积是多少？
<gadget id="calculator">2.5 / 2</gadget>
<output>1.25</output>

<gadget id="calculator">1.25 ** 2</gadget>
<output>1.5625</output>

<gadget id="calculator">3.14 * 1.5625 * 4</gadget>
<output>19.625</output>

<result>19.625</result>