According to information from Liu Chengyang, there are 40 people in the dance group of Great International Primary School, the number of people in the dance group is (2/3) the number of people in the music group, and the number of people in the music group is (3/4) the number of people in the martial arts group. How many people are there in the martial arts group?
从刘程洋得到信息，格瑞特国际小学舞蹈组有40人，舞蹈组人数是音乐组人数的(2/3)，音乐组人数又是武术组人数的(3/4)．武术组有多少人？
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">40 / (2/3) / (3/4)</gadget>
<output>80</output>

<result>80</result>