Mom bought two kinds of fruits, the total price is 8 yuan, the weight of type A fruit is (4/5) kg, the weight of type B fruit is (2/5) of type A fruit, what is the unit price of type B fruit Yuan/kg
妈妈买了两种水果，总价都是8元，甲种水果的重量是(4/5)kg，乙种水果的重量是甲种水果的(2/5)，乙种水果的单价是多少元/kg
<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">(4/5) * (2/5)</gadget>
<output>8/25 = around 0.32</output>

<gadget id="calculator">8 / (8/25)</gadget>
<output>25</output>

<result>25</result>