A log with a length of 2.5 meters and a cross-sectional radius of 10 cm is processed into the largest square log. What is the volume of the square log in cubic decimeters?
一根长2.5米，横截面半径是10厘米的圆木，把它加工成最大的方木，方木的体积是多少立方分米？
<gadget id="calculator">10 ** 2</gadget>
<output>100</output>

<gadget id="calculator">2.5 * 10</gadget>
<output>25</output>

<gadget id="calculator">2 * 100 * 25</gadget>
<output>5_000</output>

<result>5_000</result>