A car travels at 60 kilometers per hour on the road and 40 kilometers per hour on the mountain road. The car travels on the road and on the mountain road for 4 hours each. How many kilometers has it traveled in total?
一辆汽车在公路上的速度为每小时60千米，在山路上的速度为每小时40千米，这辆汽车在公路上和山路上各行驶了4小时，一共行驶了多少千米？
<gadget id="calculator">60 + 40</gadget>
<output>100</output>

<gadget id="calculator">100 * 4</gadget>
<output>400</output>

<result>400</result>