In order to improve her beauty, Xiaomei made her own orange juice. Pour 2 liters out of a bottle of pure fresh orange juice, and then fill it up with water. At this time, the ratio of pure fresh orange juice to water is 1:8. How many liters does this bottle of orange juice contain?
小梅为了养颜，自己配制橙汁．一瓶纯鲜橙汁倒出2升后，再用水兑满，这时纯鲜橙汁与水的比是1：8，原来这瓶橙汁有多少升？
<gadget id="calculator">1 + 8</gadget>
<output>9</output>

<gadget id="calculator">8 / 9</gadget>
<output>8/9 = around 0.888889</output>

<gadget id="calculator">2 / (8/9)</gadget>
<output>9/4 = around 2.25</output>

<result>9/4 = around 2.25</result>