Zhiqiang finished reading a book in two days. On the first day, he read (3/5) of the whole book. On the second day, he read 35 pages less than on the first day. How many pages in this book?
志强两天读完一本书，第一天读了全书的(3/5)，第二天读的页数比第一天少35页，这本书共多少页？
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">1 - (3/5)</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">(3/5) - (2/5)</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">35 / (1/5)</gadget>
<output>175</output>

<result>175</result>