Zhang Ming borrowed a story book from the library, started reading it on March 10, read 11 pages a day, and finished it on March 20. How many pages does this storybook have?
张明在图书馆借了一本故事书，3月10日开始看，每天看11页，3月20日看完．这本故事书有多少页．
<gadget id="calculator">11 * 11</gadget>
<output>121</output>

<result>121</result>