The launching ceremony of the national "Cheerleading" was grandly held in Bachuan Middle School, and all the students in the first and second grades of junior high school participated. Among them, there are 80 boys in the first grade small class, and the number of girls is equivalent to that of boys (7/8); the number of participants in the second grade small class is twice that of the first grade girls, 20 people, how many people participate in the second grade small class?
全国"啦啦操"启动仪式在八川中学隆重举行，初一二年级小班学生均参加．其中初一年级小班有男生80人，女生人数相当于男生的(7/8)；初二年级小班参加的人数是初一年级女生的2倍少20人，初二年级小班有多少人参加？
<gadget id="calculator">7 / 8</gadget>
<output>7/8 = around 0.875</output>

<gadget id="calculator">80 * (7/8) * 2</gadget>
<output>140</output>

<gadget id="calculator">140 - 20</gadget>
<output>120</output>

<result>120</result>