There is a piece of wood with a side length of 9 decimeters. If this piece of wood is processed into a largest cone, what is the volume cut off?
有一块正方体的木材，它的棱长是9分米，把这块木料加工成一个最大的圆锥体，被削去的体积是多少？
<gadget id="calculator">9 * 9 * 9</gadget>
<output>729</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</gadget>
<output>1/3 = around 0.333333</output>

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

<gadget id="calculator">729 - 190.755</gadget>
<output>538.245</output>

<result>538.245</result>