Xiaoli reads an extra-curricular book, and has already read 35 pages, which happens to be (5/9) of this book. How many pages are left unread?
小丽看一本课外书，已经看了35页，正好是这本书的(5/9)，还有多少页没有看？
<gadget id="calculator">5 / 9</gadget>
<output>5/9 = around 0.555556</output>

<gadget id="calculator">35 / (5/9)</gadget>
<output>63</output>

<gadget id="calculator">63 - 35</gadget>
<output>28</output>

<result>28</result>