The radius of the base area of a cylinder is 3dm, and the height is 4dm. What is the volume of a cone with the same base and height as dm**3.
一个圆柱的底面积半径是3dm，高4dm，与它等底等高的圆锥的体积是多少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 * 4</gadget>
<output>37.68</output>

<result>37.68</result>