Xiao Ming reads a story book and has read 25% of the whole book, leaving 360 pages unread. How many pages does this book have?
小明读一本故事书，已经读了全书的25%，还剩下360页没有读．这本书共有多少页？
<gadget id="calculator">25 / 100</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 - (1/4)</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">360 / (3/4)</gadget>
<output>480</output>

<result>480</result>