There are 203 students in the first grade, 16 more than the second grade. How many students are there in the first and second grades?
一年级有203人，比二年级多16人，一、二年级一共有多少人？
<gadget id="calculator">203 - 16</gadget>
<output>187</output>

<gadget id="calculator">203 + 187</gadget>
<output>390</output>

<result>390</result>