There are 100 students in the fifth grade of a certain elementary school, how many. How many students are there in the fourth grade? 100/(4/5).
某小学五年级100名学生，多少．四年级有学生多少名？100/(4/5)．
<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<result>4/5 = around 0.8</result>