There is a cube of wood with a side length of 20 cm, planed into a cylinder with the largest diameter at the bottom, what is the volume of the wood after planing?
有一块棱长20厘米的正方体木料，刨成一个底面直径最大的圆柱体，刨去木料的体积是多少？
<gadget id="calculator">20 * 20 * 20</gadget>
<output>8_000</output>

<gadget id="calculator">20 / 2</gadget>
<output>10</output>

<gadget id="calculator">10 ** 2</gadget>
<output>100</output>

<gadget id="calculator">3.14 * 100 * 20</gadget>
<output>6_280</output>

<gadget id="calculator">8_000 - 6_280</gadget>
<output>1_720</output>

<result>1_720</result>