Students in a certain school participate in labor and are divided into several groups. If there are 10 students in a group, the division will be completed. If there are 12 students in a group, there will be a difference of 10 students. How many people are involved in the labor force.
某校学生参加劳动，分成若干组，如果10人一组，正好分完，如果12人一组，差10人．参加劳动的有多少人．
<gadget id="calculator">12 - 10</gadget>
<output>2</output>

<gadget id="calculator">10 / 2</gadget>
<output>5</output>

<gadget id="calculator">5 * 10</gadget>
<output>50</output>

<result>50</result>