If a log with a base diameter of 20cm and a height of 30cm is to be cut into the largest cone, what is the cut volume in cm**3.
一个底面直径是20cm，高30cm的圆木，要削成一个最大的圆锥，削去的体积是多少cm**3．
<gadget id="calculator">20 / 2</gadget>
<output>10</output>

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

<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">3.14 * 100 * 30 * (2/3)</gadget>
<output>6_280</output>

<result>6_280</result>