For a manuscript, a typist typed (1/7) of the entire manuscript on the first day and (2/5) on the second day, and typed 9 pages less on the first day than on the second day. This manuscript has a total of how many pages
一份稿件，某打字员第一天打了全稿的(1/7)，第二天打了(2/5)，第一天比第二天少打了9页，这份稿件一共有多少页？
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1 / 7</gadget>
<output>1/7 = around 0.142857</output>

<gadget id="calculator">(2/5) - (1/7)</gadget>
<output>9/35 = around 0.257143</output>

<gadget id="calculator">9 / (9/35)</gadget>
<output>35</output>

<result>35</result>