There are 450 boys in the railway primary school, and the number of girls is as many as boys (4/5). How many students are there in this school?
铁路小学有男生450人，女生的人数是男生的(4/5)．这个学校共有学生多少人？
<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">450 * (4/5)</gadget>
<output>360</output>

<gadget id="calculator">450 + 360</gadget>
<output>810</output>

<result>810</result>