In the fifth grade supernormal class selection test, fewer students got excellent ratings than good ratings (4/5). There were 400 students who got good ratings. How many of them got excellent ratings?
在五年级超常班选拔考试中，得到优秀评级的同学比得到良好评级的同学少(4/5)，得到良好评级的同学有400人，有多少人得到优秀评级？
<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">1 - (4/5)</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">400 * (1/5)</gadget>
<output>80</output>

<result>80</result>