The circumference of the base of a cone is 18.84 cm and the height is 5 cm. Find the volume of the cone.
一个圆锥的底面周长为18.84厘米，高是5厘米，求圆锥的体积．
<gadget id="calculator">18.84 / 3.14 / 2</gadget>
<output>3</output>

<gadget id="calculator">3 ** 2</gadget>
<output>9</output>

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">3.14 * 9 * 5 * (1/3)</gadget>
<output>47.1</output>

<result>47.1</result>