Students from 6 grades of Huafeng Primary School participated in the rope skipping competition. There were 5 classes in each grade, and 23 people in each class participated. How many people are there in total?
华风小学6个年级的同学参加跳绳比赛，每个年级有5个班，每班有23人参加．一共有多少人参加比赛？
<gadget id="calculator">23 * 5 * 6</gadget>
<output>690</output>

<result>690</result>