The teacher wants to print a 50-page manuscript, with 25 lines per page and 24 characters per line. How many characters are there in this manuscript?
老师要打印一部50页的书稿，每页25行，每行24个字，这本书稿共有多少个字？
<gadget id="calculator">24 * 25</gadget>
<output>600</output>

<gadget id="calculator">600 * 50</gadget>
<output>30_000</output>

<result>30_000</result>