Xiaowei is reading a book. I have read 168 pages of this book, and there is still (3/7) left. How many pages does this book have?
小玮看一本书．这本书我已经看了168页，还剩下(3/7)没有看．这本书一共有多少页？
<gadget id="calculator">3 / 7</gadget>
<output>3/7 = around 0.428571</output>

<gadget id="calculator">1 - (3/7)</gadget>
<output>4/7 = around 0.571429</output>

<gadget id="calculator">168 / (4/7)</gadget>
<output>294</output>

<result>294</result>