Xiaomeng reads a book, read the whole book on the first day (3/10), read the whole book on the second day (1/5), read 10 pages more on the first day than on the second day, how many pages are there in total in this book Page.
小盟读一本书，第一天读全书的(3/10)，第二天读全书的(1/5)，第一天比第二天多读10页，这本书一共是多少页页．
<gadget id="calculator">3 / 10</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">(3/10) - (1/5)</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">10 / (1/10)</gadget>
<output>100</output>

<result>100</result>