There are 49 students in Class 3 and 1, among which there are 5 fewer girls than boys. How many boys are there?
三1班有学生49人，其中女生比男生少5人．男生有多少人．
<gadget id="calculator">49 + 5</gadget>
<output>54</output>

<gadget id="calculator">54 / 2</gadget>
<output>27</output>

<result>27</result>