A car departs from A at 8:00 and arrives at B at 15:00. How many hours does the car drive in total?
一辆汽车8：00从甲地出发，于15：00到达乙地，汽车一共行驶多少小时．
<gadget id="calculator">15 - 8</gadget>
<output>7</output>

<result>7</result>