A car travels m kilometers per hour. It travels for 5 hours in the morning and 3 hours in the afternoon. How many kilometers does the car travel in one day?
一辆汽车每小时行m千米，上午行了5小时，下午行了3小时，这辆汽车一天一共行了多少千米．
<gadget id="calculator">5 + 3</gadget>
<output>8</output>

<result>8</result>