Nan Nan reads a book called Animal World, and reads 23 pages a day. After reading it for a week, there are still 18 pages left. How many pages are there in total in this book?
南南看一本动物世界，每天看23页，看了一星期还有18页没看，这本动物世界一共有多少页？
<gadget id="calculator">23 * 7</gadget>
<output>161</output>

<gadget id="calculator">161 + 18</gadget>
<output>179</output>

<result>179</result>