Two people, A and B, walk towards each other from both places A and B at the same time, and finally meet at a distance of 600 meters from the midpoint. When they meet, what is the distance traveled by them in meters?
甲、乙两人同时从甲、乙两地相向而行，结果在距中点600米处相遇，相遇时，两人所行的路程差是多少米．
<gadget id="calculator">600 + 600</gadget>
<output>1_200</output>

<result>1_200</result>