If a certain grain store sells all the rice in one day (2/9), the next day it sells the same amount of rice as the first day, what fraction of the total rice is sold in the two days? What fraction is left?
某粮店一天卖出全部大米的(2/9)，第二天卖出的大米和第一天同样多，两天共卖出全部大米的几分之几？还剩几分之几？
<gadget id="calculator">2 / 9</gadget>
<output>2/9 = around 0.222222</output>

<gadget id="calculator">(2/9) + (2/9)</gadget>
<output>4/9 = around 0.444444</output>

<gadget id="calculator">1 - (4/9)</gadget>
<output>5/9 = around 0.555556</output>

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