A total of 83 students participated in interest group activities in a certain school. Among them, there are 25 people in the music group, the number of the computer group is 1.2 times that of the music group, and the rest is the painting group. How many people are there in the painting group?
某校参加兴趣小组活动的学生共83人．其中音乐小组有25人，微机小组的人数是音乐小组的1.2倍，其余的是绘画小组．绘画小组有多少人？
<gadget id="calculator">25 * 1.2</gadget>
<output>30</output>

<gadget id="calculator">25 + 30</gadget>
<output>55</output>

<gadget id="calculator">83 - 55</gadget>
<output>28</output>

<result>28</result>