Xiao Pang and Xiao Ding Ding started from both ends of a road at the same time and walked toward each other. Xiao Pang traveled 250 meters per minute, and Xiao Ding Ding traveled 200 meters per minute. They met after 12 minutes. How long is this road?
小胖和小丁丁骑自行车从一条公路的两端同时出发相向而行，小胖每分钟行250米，小丁丁每分钟行200米，12分钟后他们相遇了．这条公路有多长？
<gadget id="calculator">250 + 200</gadget>
<output>450</output>

<gadget id="calculator">450 * 12</gadget>
<output>5_400</output>

<result>5_400</result>