The radius of the base of a cone is 3dm and the height is 8dm. What is its volume dm**3.
一个圆锥的底面半径是3dm，高是8dm，它的体积是多少dm**3．
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

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

<gadget id="calculator">(1/3) * 3.14 * 9 * 8</gadget>
<output>75.36</output>

<result>75.36</result>