Zhang Nan weighs 36 kg, Liu Qing is 2 kg lighter than Zhang Nan, what is the average weight of the two of them?
张楠体重36千克，刘青比张楠轻2千克，她俩体重平均多少千克．
<gadget id="calculator">36 - 2</gadget>
<output>34</output>

<gadget id="calculator">36 + 34</gadget>
<output>70</output>

<gadget id="calculator">70 / 2</gadget>
<output>35</output>

<result>35</result>