A cylindrical beverage bottle (not including the neck) has a volume of 480 ml and contains some beverages. The height of the beverage in the bottle is 16 cm when it is placed upright, and the upper end is 4 cm empty when it is placed upside down. What is the volume of the beverage in the bottle?
一个圆柱形饮料瓶(不包括瓶颈)它的容积是480毫升，里面装有一些饮料，正放时瓶中饮料高16厘米，倒放时上端空出4厘米，瓶中饮料体积多少毫升．
<gadget id="calculator">16 + 4</gadget>
<output>20</output>

<gadget id="calculator">16 / 20</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">480 * (4/5)</gadget>
<output>384</output>

<result>384</result>