When the engineering team repaired the railway, it repaired the required part (1/9) for the first time, and repaired the required part (2/9) for the second time. What percentage of the required part was repaired twice?
工程队修铁路，第一次修了要修部分的(1/9)，第二次修了要修部分的(2/9)，两次共修了要修部分的几分之几？
<gadget id="calculator">1 / 9</gadget>
<output>1/9 = around 0.111111</output>

<gadget id="calculator">2 / 9</gadget>
<output>2/9 = around 0.222222</output>

<gadget id="calculator">(1/9) + (2/9)</gadget>
<output>1/3 = around 0.333333</output>

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