A 5 liter drink bottle is filled with pure orange juice. After Xiao Lin drank two liters, he filled it with pure water and shook it well. The next day, after he drank another two liters of beverage, he still filled it with pure water and shook it well. What is the proportion of pure orange juice in the beverage at this time?
一个5升的饮料瓶灌满纯桔子汁．小林喝了两升后，又用纯净水将它灌满摇匀．第二天，他再喝了两升饮料后，仍然用纯净水将它灌满摇匀，这时的饮料中，纯桔子汁含量占的面分比是多少．
<gadget id="calculator">5 - 2</gadget>
<output>3</output>

<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">2 * (3/5)</gadget>
<output>6/5 = around 1.2</output>

<gadget id="calculator">3 - (6/5)</gadget>
<output>9/5 = around 1.8</output>

<gadget id="calculator">(9/5) / 5</gadget>
<output>9/25 = around 0.36</output>

<result>9/25 = around 0.36</result>