There are 400 students in the second grade of Dongfeng Primary School, and there are 1/5 fewer students in the third grade than in the second grade. How many students are there in third grade?
东风小学二年级有400学生，三年级比二年级少(1/5)．三年级有多少名学生？
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

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

<gadget id="calculator">400 - 80</gadget>
<output>320</output>

<result>320</result>