A car travels for 2.5 hours in the morning at an average of 45 kilometers per hour. In the afternoon, we traveled a total of 139 kilometers. How many kilometers did the car travel in one day?
一辆汽车上午行2.5小时，平均每小时行45千米．下午共行了139千米．这辆汽车一天共行了多少千米？
<gadget id="calculator">45 * 2.5</gadget>
<output>112.5</output>

<gadget id="calculator">112.5 + 139</gadget>
<output>251.5</output>

<result>251.5</result>