It is hoped that there are 68 students in the first grade of elementary school, which is less than the number of students in the second grade (1/5). How many students are there in the second grade?
希望小学一年级有学生68人，比二年级的学生数少(1/5)，二年级有学生多少人？
<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">68 / (4/5)</gadget>
<output>85</output>

<result>85</result>