Our school has established a choir and waist drum team. Among them, there are 20 people participating in the waist drum team, which is (2/5) the number of people in the chorus team. How many people are there in the chorus team?
我校成立了合唱团和腰鼓队．其中参加腰鼓队的有20人，是合唱队人数的(2/5)，参加合唱队的有多少人？
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">20 / (2/5)</gadget>
<output>50</output>

<result>50</result>