Xiaolejia is 405 meters away from grandma's house. One day, he took a dog to grandma's house, the dog ran to grandma's house as soon as he set off, and returned immediately after arriving at grandma's house. ． It is known that Xiao Le walks 45 meters per minute, and the dog runs 200 meters per minute, so how many meters did the dog run when Xiao Le arrived at grandma's house?
小乐家距离奶奶家405米．一天，他带着一条狗去奶奶家，一出发狗就跑向奶奶家，到奶奶家后又立即返回，回来遇到小乐后，它又跑向奶奶家，狗就这样来回不停地跑．已知小乐每分钟走45米，狗每分钟跑200米，那么小乐到奶奶家时，狗共跑了多少米？
<gadget id="calculator">405 / 45</gadget>
<output>9</output>

<gadget id="calculator">200 * 9</gadget>
<output>1_800</output>

<result>1_800</result>