There are three classes in the sixth grade of Nanyuan Primary School, with a total of 124 students. Among them, the number of students in class one is more than that of class two (1/5), and the number of students in class three is less than that of class two (1/10). How many students are there in class two? people? (Arithmetic solution)
南苑小学六年级有三个班，共有学生124人，其中一班的学生人数比二班多(1/5)，三班的学生人数比二班少(1/10)，二班学生有多少人？(算术方法解)
<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">1 / 10</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">1 - (1/10)</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">(6/5) + 1 + (9/10)</gadget>
<output>31/10 = around 3.1</output>

<gadget id="calculator">124 / (31/10)</gadget>
<output>40</output>

<result>40</result>