A train is loaded with 20 tons of cargo, and (4/5) of the total cargo is aquatic products, of which yellow croakers occupy (5/8). How many tons of yellow croakers are in this car?
一辆火车装了20吨货物，货物总量的(4/5)是水产，在水产中黄鱼占有(5/8)．这辆车中黄鱼有多少吨．
<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">5 / 8</gadget>
<output>5/8 = around 0.625</output>

<gadget id="calculator">20 * (4/5) * (5/8)</gadget>
<output>10</output>

<result>10</result>