A story book has 163 pages. I read 56 pages on the first day and 43 pages on the second day. How many pages should I read on the third day?
一本故事书有163页，第一天看了56页，第二天看了43页，第三天应从多少页看起．
<gadget id="calculator">56 + 43 + 1</gadget>
<output>100</output>

<result>100</result>