When reading a book, I read the whole book (2/7) on the first day, and read 5 pages less on the second day than on the first day, leaving 62 pages unread. How many pages does this book have?
看一本书，第一天看了全书的(2/7)，第二天比第一天少看5页，还剩62页没看，这本书共有多少页？
<gadget id="calculator">62 - 5</gadget>
<output>57</output>

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

<gadget id="calculator">1 - (2/7) - (2/7)</gadget>
<output>3/7 = around 0.428571</output>

<gadget id="calculator">57 / (3/7)</gadget>
<output>133</output>

<result>133</result>