A story book originally had 450 characters per page, and now it has 22 pages. When reprinting, the words were changed to smaller size, and only 18 pages were needed. How many more characters per page now than before?
一本故事书，原来每页排450字，排了22页．再版时字改小了，只需排18页．现在每页比原来多排多少个字？
<gadget id="calculator">22 / 18</gadget>
<output>11/9 = around 1.222222</output>

<gadget id="calculator">450 * (11/9)</gadget>
<output>550</output>

<gadget id="calculator">550 - 450</gadget>
<output>100</output>

<result>100</result>