A piece of wood with a side length of 30 cm is planed into a cylinder with the largest diameter at the bottom. What is the volume of the wood after it has been planed in cubic centimeters?
有一块棱长是30厘米的正方体木料，刨成一个底面直径最大的圆柱，刨去木料的体积是多少立方厘米．
<gadget id="calculator">30 * 30 * 30</gadget>
<output>27_000</output>

<gadget id="calculator">30 / 2</gadget>
<output>15</output>

<gadget id="calculator">15 ** 2</gadget>
<output>225</output>

<gadget id="calculator">3.14 * 225 * 30</gadget>
<output>21_195</output>

<gadget id="calculator">27_000 - 21_195</gadget>
<output>5_805</output>

<result>5_805</result>