Xiaohong reads a story book and has already read 18 pages, and the number of remaining pages is 40 times the number of pages she has read. How many pages does this book have in total?
小红看一本故事书，已经看了18页，剩下的页数是已看页数的40倍．这本书一共有多少页．
<gadget id="calculator">18 * 40</gadget>
<output>720</output>

<gadget id="calculator">18 + 720</gadget>
<output>738</output>

<result>738</result>