A cube with a side length of 9 decimeters is cut into the largest cone. What is the volume of the cone?
一个棱长9分米的正方体木块，把它削成最大的圆锥，圆锥的体积是多少？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">9 / 2</gadget>
<output>9/2 = around 4.5</output>

<gadget id="calculator">(9/2) ** 2</gadget>
<output>81/4 = around 20.25</output>

<gadget id="calculator">(1/3) * 3.14 * (81/4) * 9</gadget>
<output>190.755</output>

<result>190.755</result>