The school held a sports meeting, and the 4 students in Class 1 of the third grade participated in the 4*100-meter relay. How many ways are there in the order of their relay?
学校开运动会，三年级一班同学参加4*100米接力的4名同学，他们的接力次序有多少种排法．
<gadget id="calculator">4 * 3 * 2 * 1</gadget>
<output>24</output>

<result>24</result>