4 students perform a small chorus, and it is stipulated that Xiao Ming, the lead singer, should stand in the first position from the left, and the other 3 students can stand randomly. How many ways are there for them to stand in line?
4名同学表演小合唱，规定领唱小明要站在左起第一个位置，其他3人随便站，他们站队的方法有多少种？
<gadget id="calculator">3 * 2 * 1</gadget>
<output>6</output>

<result>6</result>