There are 3 batches of students visiting in the morning, 169 students in each batch, and 213 students visiting in the afternoon. How many students came to visit on this day?
上午有3批学生来参观，每批169人，下午参观的学生有213人，这一天共有多少学生来参观？
<gadget id="calculator">3 * 169</gadget>
<output>507</output>

<gadget id="calculator">507 + 213</gadget>
<output>720</output>

<result>720</result>