There are 8 students taking pictures in a row, and 4 of them must stand together. How many ways to stand together?
有8个同学排一排照相，其中4个好朋友一定要站在一起，共有多少种站法？
<gadget id="calculator">120 * 24</gadget>
<output>2_880</output>

<result>2_880</result>