A bus departs from Guangzhou at 8:00 am and arrives in Zhuhai at 11:00 am. How many hours has the bus traveled in total?
一辆大客车上午8时从广州出发，上午11时到达珠海市，这辆车共行驶了多少小时．
<gadget id="calculator">11 - 8</gadget>
<output>3</output>

<result>3</result>