The number of girls is half of the number of boys. The average weight of boys is 35 kg, and the average weight of girls is 32 kg. What is the average weight of all the students in the class?
女生人数是男生人数的一半，男生平均体重是35千克，女生平均体重是32千克，该班全体同学的平均体重是多少千克．
<gadget id="calculator">35 * 20</gadget>
<output>700</output>

<gadget id="calculator">32 * 10</gadget>
<output>320</output>

<gadget id="calculator">700 + 320</gadget>
<output>1_020</output>

<gadget id="calculator">20 + 10</gadget>
<output>30</output>

<gadget id="calculator">1_020 / 30</gadget>
<output>34</output>

<result>34</result>