How much wood should be cut from a cylindrical wood with a base circumference of 12.56dm and a height of 6dm to form the largest cone?
把一个底面周长是12.56dm、高6dm的圆柱体木料削成一个最大的圆锥体，应削去多少木料？
<gadget id="calculator">12.56 / 3.14 / 2</gadget>
<output>2</output>

<gadget id="calculator">2 ** 2</gadget>
<output>4</output>

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

<gadget id="calculator">3.14 * 4 * 6 * (2/3)</gadget>
<output>50.24</output>

<result>50.24</result>