A composition has two pages, each page has 22 lines, and each line has 21 characters. How many characters are there in this composition?
一篇作文有两页，每页22行，每行21个字，这篇作文一共有多少个字？
<gadget id="calculator">21 * 22 * 2</gadget>
<output>924</output>

<result>924</result>