There are a total of 630 students in the sixth grade, of which 25% more boys than girls, how many more boys than girls?
六年级共有学生630人，其中男生比女生多25%，男生比女生多多少人？
<gadget id="calculator">25 / 100</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 + 1 + (1/4)</gadget>
<output>9/4 = around 2.25</output>

<gadget id="calculator">630 / (9/4)</gadget>
<output>280</output>

<gadget id="calculator">630 - 280 - 280</gadget>
<output>70</output>

<result>70</result>