Read a book mischievously. The ratio of the number of pages you have read to the number of remaining pages is 1:3. If you read 14 more pages, you can finish 60% of the book. How many pages does this book have?
淘气看一本书，已看的页数与剩下的页数的比是1：3，如果再看14页，就可以看完这本书的60%，这本书共有多少页？
<gadget id="calculator">60 / 100</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">1 + 3</gadget>
<output>4</output>

<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">(3/5) - (1/4)</gadget>
<output>7/20 = around 0.35</output>

<gadget id="calculator">14 / (7/20)</gadget>
<output>40</output>

<result>40</result>