In the activity of learning from Lei Feng, 12 communities in the whole town participated in this activity. Each community formed 6 groups with 25 people in each group. How many people participated in this activity?
在学习雷锋活动中，全镇有12个社区参加了这次活动，每个社区组成6组，每组有25人，此次活动一共有多少人参加？
<gadget id="calculator">25 * 6 * 12</gadget>
<output>1_800</output>

<result>1_800</result>