A conical part has a bottom diameter of 20cm and a height of 30cm. What is the volume of this part dm**3.
一个圆锥形零件，它的底面直径是20cm，高30cm，这个零件的体积是多少dm**3．
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">20 / 2</gadget>
<output>10</output>

<gadget id="calculator">10 ** 2</gadget>
<output>100</output>

<gadget id="calculator">30 / 1_000</gadget>
<output>3/100 = around 0.03</output>

<gadget id="calculator">(1/3) * 3.14 * 100 * (3/100)</gadget>
<output>3.14</output>

<result>3.14</result>