A book has 126 pages. I read the whole book (1/9) for the first time, and read the whole book (2/7) for the second time. How many pages have I read in total?
一本书有126页，第一次看了全书的(1/9)，第二次看了全书的(2/7)，两次共看了多少页？
<gadget id="calculator">1 / 9</gadget>
<output>1/9 = around 0.111111</output>

<gadget id="calculator">2 / 7</gadget>
<output>2/7 = around 0.285714</output>

<gadget id="calculator">(1/9) + (2/7)</gadget>
<output>25/63 = around 0.396825</output>

<gadget id="calculator">126 * (25/63)</gadget>
<output>50</output>

<result>50</result>