If the volume of a cylinder increases by 4 cubic meters, the volume of a cone with the same base and height will increase by that cubic meter.
如果一个圆柱的体积增加4立方米，则与它等底等高的圆锥体的体积就增加多少立方米．
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">4 * (1/3)</gadget>
<output>4/3 = around 1.333333</output>

<result>4/3 = around 1.333333</result>