There are three interest groups in the school: art, music, and sports. Each group has 30 people. The number of boys in the first group is the same as the number of girls in the second group. The third group has (1/5) the number of girls. These three interest groups How many girls are there in the group?
学校美术、音乐、体育三个兴趣小组，每组有30人，第一组男生人数与第二组的女生人数同样多，第三组有(1/5)的人数是女生，这三个兴趣小组共有女生多少人？
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">30 * (1/5)</gadget>
<output>6</output>

<gadget id="calculator">30 / 2</gadget>
<output>15</output>

<gadget id="calculator">6 + 15 + 15</gadget>
<output>36</output>

<result>36</result>