The radius of the base of a cone is (3/5) the radius of the base of a cylinder, and the ratio of the height of the cylinder to the height of the cone is 4:5, so the volume of the cone is the volume of the cylinder.
一个圆锥的底面半径是一个圆柱底面半径的(3/5)，圆柱的高与圆锥高的比是4：5，那么圆锥的体积是圆柱体积的多少．
<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>

<gadget id="calculator">5 ** 2</gadget>
<output>25</output>

<gadget id="calculator">3.14 * 25 * 4</gadget>
<output>314</output>

<gadget id="calculator">47.1 / 314</gadget>
<output>0.15</output>

<result>0.15</result>