Xiao Ming reads a book and has already read several pages. If he reads 4 more pages, then the number of pages he has read is 3/10 of the whole book. If he must return the book after 8 days, he must read 11 pages per day on average for the remaining 8 days. , how many pages does this book have?
小明阅读一本书，已经读了若干页，如果再读4页，那么阅读过的页数是全书的(3/10)，如果8天后必须还书，那么余下8天平均每天必须读11页，问这本书共有多少页？
<gadget id="calculator">11 * 8</gadget>
<output>88</output>

<gadget id="calculator">88 - 4</gadget>
<output>84</output>

<gadget id="calculator">3 / 10</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">1 - (3/10)</gadget>
<output>7/10 = around 0.7</output>

<gadget id="calculator">84 / (7/10)</gadget>
<output>120</output>

<result>120</result>