12. On the highway between $\mathrm{A}$ and $\mathrm{B}$, the speed limit for vehicles traveling from $\mathrm{A}$ to $\mathrm{B}$ is 50 kilometers per hour, and for vehicles traveling from $\mathrm{B}$ to $\mathrm{A}$ is 60 kilometers per hour. Now, two cars, Car A and Car B, start simultaneously from $\mathrm{A}$ and $\mathrm{B}$ respectively, and travel back and forth between the two places. When Car A reaches $\mathrm{B}$ and is on its way back to $\mathrm{A}$, it stops due to a malfunction, and the stopping point is 30 kilometers from $\mathrm{B}$. The two cars meet for the second time at this location, which is 1 hour and 12 minutes later than the originally scheduled second meeting time. What is the distance between the two places? $\qquad$ kilometers.
【Analysis】Car A's travel time from $\mathrm{A}$ to $\mathrm{B}$ and back to $\mathrm{A}$ is the same as Car B's travel time from $\mathrm{B}$ to $\mathrm{A}$ and back to $\mathrm{B}$ (since both cars travel at a speed of 50 km/h from $\mathrm{A}$ to $\mathrm{B}$ and 60 km/h from $\mathrm{B}$ to $\mathrm{A}$).
When they meet for the second time, Car B is still 30 kilometers away from $\mathrm{B}$, which will take $30 \div 50=0.6$ hours to cover.
This means that 1.8 hours have passed since the originally scheduled second meeting time, which is $1.2+0.6=1.8$ hours.
If Car A had not broken down, it should have just returned to $\mathrm{A}$ at this time.
Under normal circumstances, the total distance covered by both cars at this point would be 4 times the full distance, while the total distance covered when they meet for the second time is 3 times the full distance. This means that in 1.8 hours, the total distance covered by both cars increased by 1 full distance.
Therefore, the full distance is $(50+60) \times 1.8=198$ kilometers.