Two people are walking toward each other from two places at the same time, A is 16 kilometers per hour, and B is 65 kilometers per hour. A meets B at a distance of 62.4 kilometers from the starting point. How far is it between A and B? Use two methods of solving equations and calculating formulas.
两人同时从两地相向而行，甲每时16千米，乙每时65千米．甲离出发点62.4千米处与乙相遇．AB两地相距多少？使用解方程和算式两种方法．
<gadget id="calculator">62.4 / 16</gadget>
<output>3.9</output>

<gadget id="calculator">3.9 * 65</gadget>
<output>253.5</output>

<gadget id="calculator">253.5 + 62.4</gadget>
<output>315.9</output>

<result>315.9</result>