Uncle Zhang travels by bicycle. He travels 52 kilometers on the first day, 38 kilometers in the morning on the second day, 27 kilometers in the afternoon, and 48 kilometers on the third day. How many kilometers does he travel on average every day?
张叔叔骑自行车旅行，他第一天行52千米，第二天上午行38千米，下午行27千米，第三天行48千米，他平均每天行多少千米？
<gadget id="calculator">52 + 38 + 27 + 48</gadget>
<output>165</output>

<gadget id="calculator">165 / 3</gadget>
<output>55</output>

<result>55</result>