A car traveled a total of 80 kilometers in the first 2 hours, and 43.5 kilometers and 44.5 kilometers in the next 2 hours. How many kilometers per hour does the car travel on average?
一辆汽车前2小时一共行80千米，后2小时分别行了43.5千米和44.5千米，这辆汽车平均每小时行多少千米？
<gadget id="calculator">80 + 43.5 + 44.5</gadget>
<output>168</output>

<gadget id="calculator">2 + 2</gadget>
<output>4</output>

<gadget id="calculator">168 / 4</gadget>
<output>42</output>

<result>42</result>