Xiaogang read a story book, 125 pages on the first day, 87 pages on the second day, and 113 pages left. How many pages does this storybook have?
小刚读了一本故事书，第一天读了125页，第二天读了87页，还剩113页没读．这本故事书共有多少页？
<gadget id="calculator">125 + 87 + 113</gadget>
<output>325</output>

<result>325</result>