certain school organized four activity groups of painting, calligraphy, gymnastics, and chorus, with a total of 129 people (each person can only participate in one activity). (3/4) of the number of people, what is the maximum number of people in the painting group and the chorus group?
某校组织了绘画、书法、体操、合唱四个活动小组，共129人(每人限参加一项)，已知绘画组人数是书法组人数的(5/7)，书法组人数是体操组人数的(3/4)，求绘画组和合唱组最多共多少人？
<gadget id="calculator">7 / 3</gadget>
<output>7/3 = around 2.333333</output>

<gadget id="calculator">(7/3) * 21</gadget>
<output>49</output>

<gadget id="calculator">129 - 49</gadget>
<output>80</output>

<result>80</result>