The school organizes vaccinations for lower grade students. There are 160 students in the first grade and 190 students in the second grade. How many people from the two grades will participate?
学校组织低年级学生打预防针，一年级有160人，二年级有190人．两个年级一共有多少人参加？
<gadget id="calculator">160 + 190</gadget>
<output>350</output>

<result>350</result>