There are 500 boys in Yucai Primary School, and the number of girls is less than boys (1/5). How many students are there in Yucai Primary School?
育才小学有男生500人，女生人数比男生少(1/5)，育才小学有学生多少人？
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 - (1/5)</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">500 * (4/5)</gadget>
<output>400</output>

<gadget id="calculator">400 + 500</gadget>
<output>900</output>

<result>900</result>