There are 128 boys and 134 girls in the second grade of Dongfang Primary School. There are 17 more students in the second grade than in the first grade. How many students are there in the first grade?
东方小学二年级有男生128人，有女生134人，二年级学生比一年级多17人，一年级有学生多少人？
<gadget id="calculator">134 - 17</gadget>
<output>117</output>

<gadget id="calculator">128 + 117</gadget>
<output>245</output>

<result>245</result>