The circumference of the base of a cylinder is 2/3 of the circumference of the base of a cone, and the ratio of the height of the cone to the height of the cylinder is 5:3, so the volume of the cylinder is equal to the volume of the cone.
一个圆柱的底面周长是一个圆锥底面周长的(2/3)，圆锥的高与圆柱高之比是5：3，那么圆柱的体积是圆锥体积的多少．
<gadget id="calculator">4 * 3</gadget>
<output>12</output>

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">9 * 5 * (1/3)</gadget>
<output>15</output>

<gadget id="calculator">12 / 15</gadget>
<output>4/5 = around 0.8</output>

<result>4/5 = around 0.8</result>