What is the volume of a cone whose base diameter and height are 3 cm?
一个圆锥体，底面直径和高都是3厘米，它的体积是多少．
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">3 / 2</gadget>
<output>3/2 = around 1.5</output>

<gadget id="calculator">(3/2) ** 2</gadget>
<output>9/4 = around 2.25</output>

<gadget id="calculator">(1/3) * 3.14 * (9/4) * 3</gadget>
<output>7.065</output>

<result>7.065</result>