The school organizes students from three classes of the sixth grade to go to the street to remove "psoriasis". It is known that the number of participants in the first class accounts for (1/3) of the sum of the number of the second and third classes, and the number of participants in the second class accounts for the first and third classes. The number of people and (1/2), a total of 10 students in the third class participated, how many students in the sixth grade participated in this activity?
学校组织六年级三个班的学生到街上清除"牛皮癣"，已知一班参加的人数占二班、三班人数和的(1/3)，二班参加的人数占一班、三班人数和的(1/2)，三班共有10名同学参加，六年级一共有多少名学生参加了这次活动？
<gadget id="calculator">3 + 1</gadget>
<output>4</output>

<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">2 + 1</gadget>
<output>3</output>

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">1 - (1/4) - (1/3)</gadget>
<output>5/12 = around 0.416667</output>

<gadget id="calculator">10 / (5/12)</gadget>
<output>24</output>

<result>24</result>