The school held a group gymnastics performance to celebrate "June 1". The students participating in the performance were divided into 4 squares, and each square was arranged in 18 columns and 25 rows. How many students participated in the performance?
学校举行庆"六一"团体操表演，参加表演的同学分成4个方阵，每个方阵都排成了18列25行，参加表演的同学共有多少人？
<gadget id="calculator">25 * 18 * 4</gadget>
<output>1_800</output>

<result>1_800</result>