A truck and a bus drive from City A to City B at the same time. The truck travels 32 kilometers per hour, and the bus travels 24 kilometers per hour. The truck arrives at City B and spends half an hour loading and unloading the goods, then returns to City A immediately, and meets the bus on the way. The distance between the two cities is 104 kilometers. How many hours did it take for the two cars to meet each other?
货车与客车同时由甲城开往乙城，货车每小时行32千米，客车每小时行24千米，货车到达乙城用半小时装卸货物后立即返回甲城，途中与客车相遇．两城相距104千米．两车从出发到相遇用了多少小时．
<gadget id="calculator">32 * 0.5</gadget>
<output>16</output>

<gadget id="calculator">104 * 2</gadget>
<output>208</output>

<gadget id="calculator">16 + 208</gadget>
<output>224</output>

<gadget id="calculator">32 + 24</gadget>
<output>56</output>

<gadget id="calculator">224 / 56</gadget>
<output>4</output>

<result>4</result>