The Aviation Museum will be open to students on June 1. There are 3 batches of students visiting in the morning, 69 people in each batch; 213 students visiting in the afternoon. How many students came to visit that day?
航空博物馆6月1日对学生开放，上午有3批学生来参观，每批69人；下午来参观的学生有213人．这天一共有多少学生来参观？
<gadget id="calculator">69 * 3</gadget>
<output>207</output>

<gadget id="calculator">207 + 213</gadget>
<output>420</output>

<result>420</result>