What is the volume of a cone whose base radius is 1 cm and height is 3 cm?
一个圆锥的底面积半径是1厘米，高是3厘米，它的体积是多少立方厘米．
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</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>