Sunshine Primary School bought 480 science and technology books, which is 1/5 more than literature and art books. How many literature and art books did Sunshine Primary School buy? How many
阳光小学买来科技书480本，比文艺书多(1/5)，阳光小学买来文艺书多少本？多少
<gadget id="calculator">1 / 5</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">480 / (6/5)</gadget>
<output>400</output>

<result>400</result>