There are 40 students in class A, and (2/5) students from class A are selected to participate in the group gymnastics. The number of people selected from class A is exactly half of the number of students selected from class B. To participate in the rehearsal, how many people should be selected from Class B?
甲班有学生40人，从甲班选出(2/5)的人参加团体操，甲班选出的人数刚好是乙班选出人数的一半，如果从乙班选(3/4)的学生参加排练，乙班应选出多少人？
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">40 * (2/5)</gadget>
<output>16</output>

<gadget id="calculator">16 * 2</gadget>
<output>32</output>

<gadget id="calculator">32 / (2/5)</gadget>
<output>80</output>

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

<gadget id="calculator">80 * (3/4)</gadget>
<output>60</output>

<result>60</result>