In a textbook drama performance with teachers and students on the same stage, there were 54 students and teachers. It is known that the number of students is more than twice that of teachers, there are more girls than boys, there are 5 fewer female teachers than girls, and at least 3 males. Teacher, among these 54 people, how many boys are there in total?
在一次师生同台的课本剧表演活动中，学生和老师共54人，已知学生人数比老师的两倍还多，女生比男生多，女老师比女生少5人，至少有3名男老师，那么这54人中，共有男生多少人．
<gadget id="calculator">54 / 3</gadget>
<output>18</output>

<gadget id="calculator">18 * 2</gadget>
<output>36</output>

<gadget id="calculator">1 - 19</gadget>
<output>-18</output>

<gadget id="calculator">36 + (-18)</gadget>
<output>18</output>

<result>18</result>