Zhang Hong weighs 35 kilograms, Liu Jiang is 2 kilograms lighter than Zhang Hong, what is their average weight in kilograms?
张红体重35千克，刘江比张红轻2千克，他俩体重平均多少千克．
<gadget id="calculator">35 - 2</gadget>
<output>33</output>

<gadget id="calculator">33 + 35</gadget>
<output>68</output>

<gadget id="calculator">68 / 2</gadget>
<output>34</output>

<result>34</result>