Uncle Wang goes on a trip by bicycle. He travels 75 kilometers on the first day and 25 kilometers on the second day. How many kilometers does he travel on average every day?
王叔叔骑自行车去旅行，第一天行75千米，第二天行25千米，平均每天行多少千米？
<gadget id="calculator">75 + 25</gadget>
<output>100</output>

<gadget id="calculator">100 / 2</gadget>
<output>50</output>

<result>50</result>