There are 55 students in the second class of the sixth grade, and 60% of them sign up for extracurricular interest classes. How many students participate in the interest classes?
六年级二班有55名同学，有60%的人报名参加课外兴趣班，参加兴趣班的同学有多少人？
<gadget id="calculator">60 / 100</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">55 * (3/5)</gadget>
<output>33</output>

<result>33</result>