The school sets up interest groups. The number of people in the art group is 1/4 of the number of the chorus team, and the number of people in the waist drum team is 4/5 of the number of the chorus team. There are 80 people in the waist drum team. How many people are in the art group?
学校成立兴趣小组，美术组人数是合唱队人数的1/4，腰鼓队人数是合唱队人数的4/5，腰鼓队有80人，美术组有多少人？
<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">80 / (4/5)</gadget>
<output>100</output>

<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">100 * (1/4)</gadget>
<output>25</output>

<result>25</result>