Two people, A and B, are walking eastward at the same time from West Village and East Village, which are 18 kilometers apart. A rides a bicycle and travels 14 kilometers per hour. B walks at 5 kilometers per hour. A can catch up in a few hours. Second?
甲、乙两人分别从相距18千米的西村和东村同时向东而行，甲骑自行车，每小时行14千米，乙步行，每小时行5千米，几小时后甲可追上乙？
<gadget id="calculator">14 - 5</gadget>
<output>9</output>

<gadget id="calculator">18 / 9</gadget>
<output>2</output>

<result>2</result>