There is a basket of apples weighing 72 kg. I ate (1/9) of it on the first day and (5/9) of it on the second day. What fraction is left?
有一筐重72千克的苹果，第一天吃了它的(1/9)，第二天吃了它的(5/9)．还剩下几分之几？
<gadget id="calculator">1 / 9</gadget>
<output>1/9 = around 0.111111</output>

<gadget id="calculator">5 / 9</gadget>
<output>5/9 = around 0.555556</output>

<gadget id="calculator">1 - (1/9) - (5/9)</gadget>
<output>1/3 = around 0.333333</output>

<result>1/3 = around 0.333333</result>