The number of girls in a class is half of the number of boys. The average weight of boys is 41 kg, and the average weight of girls is 35 kg. What is the average weight of the students in this class?
某个班女生人数是男生人数的一半，男生的平均体重是41千克，女生的平均体重是35千克，这个班的学生的平均体重是多少千克．
<gadget id="calculator">2 * 41</gadget>
<output>82</output>

<gadget id="calculator">82 + 35</gadget>
<output>117</output>

<gadget id="calculator">2 + 1</gadget>
<output>3</output>

<gadget id="calculator">117 / 3</gadget>
<output>39</output>

<result>39</result>