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After school, Dongdong goes home first and then goes to the library. It takes 73 meters to walk. How many meters is Dongdong's home from school?
Dongdong's home is three times as far from school as Mingming's, which means Dongdong's home is twice as far from school as Mingming's, just 1800 meters.

So: the distance from Ming Ming's home to school is: 1800÷(3- 1)=900 (meters). The distance from Dongdong's home to the school is 900×3=2700 (meters).

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