Two people, A and B, are walking towards each other from A and B at the same time. A travels 200 meters per minute, and B travels 160 meters per minute. The two met at a distance of 80 meters from the midpoint. What is the distance between A and B in miles?
甲乙两人同时从A、B两地相对而行，甲每分钟行200米，乙每分钟行160米．两人在距中点80米处相遇．A、B两地相距多少千米．
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">5 + 4</gadget>
<output>9</output>

<gadget id="calculator">4 / 9</gadget>
<output>4/9 = around 0.444444</output>

<gadget id="calculator">(1/2) - (4/9)</gadget>
<output>1/18 = around 0.055556</output>

<gadget id="calculator">80 / (1/18)</gadget>
<output>1_440</output>

<result>1_440</result>