What is the volume of a cone with a base diameter of 2dm and a height of 3dm in dm**3.
底面直径是2dm，高是3dm的圆锥的体积是多少dm**3．
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">2 / 2</gadget>
<output>1</output>

<gadget id="calculator">1 ** 2</gadget>
<output>1</output>

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

<result>3.14</result>