There are 245 students in the third grade and 376 students in the fourth grade in the experimental primary school. How many students are there in the two grades?
实验小学三年级有245名学生，四年级有376名学生，两个年级一共有多少名学生？
<gadget id="calculator">245 + 376</gadget>
<output>621</output>

<result>621</result>