The radius of the base of a cone is (3/4) of 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, then 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(3/4)，圆柱的高与圆锥的高的比是4：5，那么圆锥的体积是圆柱体的多少．
<gadget id="calculator">5 / 3</gadget>
<output>5/3 = around 1.666667</output>

<gadget id="calculator">9 * (5/3)</gadget>
<output>15</output>

<gadget id="calculator">16 * 4</gadget>
<output>64</output>

<gadget id="calculator">15 / 64</gadget>
<output>15/64 = around 0.234375</output>

<result>15/64 = around 0.234375</result>