<|im_start|>system
You are a helpful assistant. You first think about the reasoning process in the mind and then provide the user with the answer. You should try to truely solve the question by yourself without cheating.  <|im_end|>
<|im_start|>user
 There are three locations $A$, $O$, and $B$ on a road, with $O$ located between $A$ and $B$. The distance between $A$ and $O$ is 1620 meters. Two people, X and Y, respectively start at $A$ and $O$ towards $B$. After 12 minutes from the start, X and Y are equidistant from point $O$. They meet at point $B$ after 36 minutes from the start. What is the distance between points $O$ and $B$ in meters? Show your work in <think> </think> tags. And return the final answer in <answer> </answer> tags.<|im_end|>
<|im_start|>assistant
Let me solve this step by step.
<think>
user
1620
There are three locations $A$, $O$, and $B$ on a road, with $O$ located between $A$ and $B$. The distance between $A$ and $O$ is 1620 meters. Two people, X and Y, respectively start at $A$ and $O$ towards $B$. After 12 minutes from the start, X and Y are equidistant from point $O$. They meet at point $B$ after 36 minutes from the start. What is the distance between points $O$ and $B$ in meters?
test