A cone is 5 decimeters high and has a base diameter of 2 decimeters. What is its volume in cubic decimeters.
一个圆锥高5分米，底面直径是2分米．它的体积是多少立方分米．
<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 * 5</gadget>
<output>5.233333</output>

<result>5.233333</result>