and B are walking towards each other from A and B at the same time. A walks 100 meters per minute, and B walks 80 meters per minute. As a result, they meet at a distance of 200 meters from the midpoint. What is the distance between A and B?
甲乙两人同时从A、B两地相对走来，甲每分钟走100米，乙每分钟走80米，结果两人在离中点200米处相遇．A、B两地相距多少米？
<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">200 / (1/18)</gadget>
<output>3_600</output>

<result>3_600</result>