A and B start from two places at the same time and walk toward each other. A travels 3.6 kilometers per hour, and B travels 5.8 kilometers per hour. They meet after 2.5 hours. How many kilometers are there between A and B?
甲、乙两人同时从两地出发相向而行，甲每小时行3.6千米，乙每小时行5.8千米，2.5小时后两人相遇．甲、乙两地相距多少千米？
<gadget id="calculator">3.6 + 5.8</gadget>
<output>9.4</output>

<gadget id="calculator">9.4 * 2.5</gadget>
<output>23.5</output>

<result>23.5</result>