4 kilograms of duck eggs can be exchanged for 5 kilograms of eggs. According to this calculation, how many kilograms of duck eggs can be exchanged for 8 kilograms of eggs?
4千克鸭蛋可以换5千克鸡蛋，照这样计算，8千克鸡蛋可以换回多少千克的鸭蛋？
<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">(4/5) * 8</gadget>
<output>32/5 = around 6.4</output>

<result>32/5 = around 6.4</result>