If a piece of wood with a side length of 20 cm is processed into the largest cylinder, what is the volume of the cut wood in cubic centimeters?
将一段棱长是20厘米的正方体木材，加工成一个最大的圆柱，削去的木材的体积是多少立方厘米．
<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>