Cast a cylindrical iron block with a base radius of 3cm and a height of 4cm into a conical part. What is the volume of this part in cm**3.
把一个底面半径是3cm，高是4cm的圆柱形铁块，铸成一个圆锥形零件，这个零件的体积是多少cm**3．
<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 * 4 * (1/3)</gadget>
<output>37.68</output>

<result>37.68</result>