Two trains, A and B, are traveling towards each other from two places 144 kilometers apart. Train A travels 28 kilometers per hour, and train B travels 22 kilometers per hour. Train B leaves first and then A does not leave. A car meets B car after how many hours.
甲、乙两列火车从相距144千米的两地相向而行，甲车每小时行28千米，乙车每小时行22千米，乙车先出发2小时后，甲车才出发．甲车行多少小时后与乙车相遇．
<gadget id="calculator">22 * 2</gadget>
<output>44</output>

<gadget id="calculator">144 - 44</gadget>
<output>100</output>

<gadget id="calculator">28 + 22</gadget>
<output>50</output>

<gadget id="calculator">100 / 50</gadget>
<output>2</output>

<result>2</result>