A bottle of pure fruit juice, Yoyo drank (1/3) the bottle for the first time, then added water to the bottle and drank (1/3), how many bottles of pure fruit juice did he drink at this time?
一瓶纯果汁，悠悠第一次喝了(1/3)瓶，然后再瓶里兑水后又喝去(1/3)，此时他喝了多少瓶纯果汁．
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">1 - (1/3)</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">(2/3) * (1/3)</gadget>
<output>2/9 = around 0.222222</output>

<gadget id="calculator">(2/9) + (1/3)</gadget>
<output>5/9 = around 0.555556</output>

<result>5/9 = around 0.555556</result>