Pour a bottle of (4/5) liter of milk into four cups on average, how much of the milk in each cup accounts for the bottle of milk.
把一瓶(4/5)升的牛奶平均倒在四个杯子中，每一个杯子中的牛奶占这瓶牛奶的多少．
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<result>1/4 = around 0.25</result>