In the gymnastics performance, there are 5 rows and 5 people in each row. Now it is changed to 4 people in each row and 6 rows. How many people are there?
在体操表演中排5排，每排5人，现在改为每排4人，排6排，多多少人．
<gadget id="calculator">5 * 5</gadget>
<output>25</output>

<gadget id="calculator">4 * 6</gadget>
<output>24</output>

<gadget id="calculator">25 - 24</gadget>
<output>1</output>

<result>1</result>