People's Primary School is actively carrying out activities. There are 48 people participating in the painting group, 18 people in the calligraphy group are 3 times less than the painting group, 18 people in the calligraphy group are 18 fewer than the music group, how many people are there in the music group?
人民小学积极开展活动．参加绘画组的有48人，书法组的人数比绘画组的3倍少18人，书法组的人数比音乐组的人数少18人，参加音乐组有多少人？
<gadget id="calculator">48 * 3</gadget>
<output>144</output>

<gadget id="calculator">144 - 18</gadget>
<output>126</output>

<gadget id="calculator">126 + 18</gadget>
<output>144</output>

<result>144</result>