Cars A and B drive towards each other from A and B respectively. The speed ratio is 7:9. After the two cars meet for the first time, they continue to move forward in the original direction. 80 kilometers away from place B, how many kilometers is the distance between places A and B?
甲、乙两车分别从A、B两地相向开出，速度比是7：9，两车第一次相遇后继续按原来方向前进，各自到达终点后立即返回，第二次相遇时甲车离B地80千米，A、B两地相距多少千米？
<gadget id="calculator">7 + 9</gadget>
<output>16</output>

<gadget id="calculator">7 / 16</gadget>
<output>7/16 = around 0.4375</output>

<gadget id="calculator">3 * (7/16)</gadget>
<output>21/16 = around 1.3125</output>

<gadget id="calculator">(21/16) - 1</gadget>
<output>5/16 = around 0.3125</output>

<gadget id="calculator">80 / (5/16)</gadget>
<output>256</output>

<result>256</result>