An article manuscript has 24 characters per line, 40 lines in total. Now it is changed to 32 characters per line, so how many lines do you need to print for this article? (Solve with ratio)
一篇文章原稿每行24个字，共40行．现改为每行32个字，那么这篇文章需要打印多少行？(用比例解)
<gadget id="calculator">24 * 40</gadget>
<output>960</output>

<gadget id="calculator">960 / 32</gadget>
<output>30</output>

<result>30</result>