A and B travel eastward from two places 24 kilometers apart at the same time. A rides a bicycle at 13 kilometers per hour, and B walks at 5 kilometers per hour. How many hours can A catch up with B?
甲、乙两人分别从相距24千米的两地同时向东行驶，甲骑自行车每小时行13千米，乙步行每小时走5千米，多少小时后甲可以追上乙．
<gadget id="calculator">13 - 5</gadget>
<output>8</output>

<gadget id="calculator">24 / 8</gadget>
<output>3</output>

<result>3</result>