There are 200 girls in the sixth grade in a certain school, and the number of boys is 10% more than that of girls. How many students are there in the sixth grade in this school?
某校六年级有女生200人，男生人数比女生多10%，该校六年级一共有多少人．
<gadget id="calculator">10 / 100</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">1 + (1/10)</gadget>
<output>11/10 = around 1.1</output>

<gadget id="calculator">200 * (11/10)</gadget>
<output>220</output>

<gadget id="calculator">220 + 200</gadget>
<output>420</output>

<result>420</result>