There are 203 students in the third grade, 279 students in the fourth grade, and 221 students in the fifth grade. How many students are there in the third, fourth, and fifth grades?
三年级有203人，四年级有279人，五年级有221人，三、四、五年级一共有多少人？
<gadget id="calculator">203 + 279 + 221</gadget>
<output>703</output>

<result>703</result>