Xiao Li has already read (3/5) of a book, which is exactly 120 pages. How many pages does this book have?
小李已经看了一本书的(3/5)，正好是120页，这本书共有多少页．
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">120 / (3/5)</gadget>
<output>200</output>

<result>200</result>