Cut a square piece of wood with an edge length of 20cm into the largest cylinder, what is the volume of the obtained cylinder in cm**3.
将一个棱长是20cm正方形木块削成一个最大的圆柱，所得圆柱的体积是多少cm**3．
<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>

<result>6_280</result>