Xiaoping, Xiaoning, Xiaogang, and Xiaochao from class 2 and 1 lined up a small board to prepare for the "six and one" performance. During the performance, the formation is constantly changing. (All standing in a row) Do the math, how many forms of formation changes did they have during the performance of the Allegro?
二1班的小平、小宁、小刚、小超4人排了一个小块板，准备"六、一"演出．在演出过程中，队形不断变化．(都站成一排)算算看，他们在演出小快板过程中，一共有多少种队形变化形式？
<gadget id="calculator">4 * 3 * 2 * 1</gadget>
<output>24</output>

<result>24</result>