The circumference of a cone is 12.56dm and its height is 6dm. What is its volume?
一个圆锥的底面周长是12.56dm，高6dm，它的体积是多少．
<gadget id="calculator">12.56 / 3.14 / 2</gadget>
<output>2</output>

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

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">3.14 * 4 * 6 * (1/3)</gadget>
<output>25.12</output>

<result>25.12</result>