There are 400 boys in the experimental primary school, and 20% more girls than boys. How many students are there in the experimental primary school?
实验小学男生有400人，女生人数比男生多20%，实验小学一共有多少人？
<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 + (1/5)</gadget>
<output>6/5 = around 1.2</output>

<gadget id="calculator">400 * (6/5)</gadget>
<output>480</output>

<gadget id="calculator">480 + 400</gadget>
<output>880</output>

<result>880</result>