book has 600 pages. Xiao Ming reads 190 pages for the first time and 200 pages for the second time. How many pages did he read in total?
一本书600页，小明第一次看了190页，第二次看了200页，他两次一共看了多少页．
<gadget id="calculator">190 + 200</gadget>
<output>390</output>

<result>390</result>