Yucai Primary School has 108 teachers, and the number of female teachers is three times that of male teachers. How many male teachers are there?
育才小学有教师108人，其中女教师人数是男教师的3倍．男教师有多少人？
<gadget id="calculator">3 + 1</gadget>
<output>4</output>

<gadget id="calculator">108 / 4</gadget>
<output>27</output>

<result>27</result>