What is the volume of a cone with base diameter 14 and height 4?
圆锥的底面直径为14，高为4，则体积是多少．
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">14 / 2</gadget>
<output>7</output>

<gadget id="calculator">7 ** 2</gadget>
<output>49</output>

<gadget id="calculator">(1/3) * 3.14 * 49 * 4</gadget>
<output>205.146667</output>

<result>205.146667</result>