Wang Xinxin and Lu Mengmeng walk toward each other from two places 2,000 meters apart at the same time. Wang Xinxin walks 110 meters per minute, and Lu Mengmeng walks 90 meters per minute. For 500 meters, after meeting Lu Mengmeng, immediately return and run to Wang Xinxin, and then immediately run to Lu Mengmeng after meeting Wang Xinxin, and keep going back and forth until the two meet. How many meters did the dog run in total?
王欣欣和陆萌萌两人同时从相距2000米的两地相向而行，王欣欣每分钟行110米，陆萌萌每分钟行90米，如果一只狗与王欣欣同时同向而行，每分钟行500米，遇到陆萌萌后立即返回跑向王欣欣，遇到王欣欣后再立即跑向陆萌萌，这样不断来回，直到两人相遇为止．狗共跑了多少米？
<gadget id="calculator">110 + 90</gadget>
<output>200</output>

<gadget id="calculator">2_000 / 200</gadget>
<output>10</output>

<gadget id="calculator">500 * 10</gadget>
<output>5_000</output>

<result>5_000</result>