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This problem translates into finding the greatest common factor of 60 and 50.
i.e. 10 decimeters.
Xiao Hai's living room is 60 decimeters long and 40 decimeters wide, and the plan is to lay square tiles on the ground, and I think he should meet the requirements.
It is to find the greatest common divisor of 36 and 8, which is 4, that is, 4 decimeters is the most appropriate.
This question is like this, 68 4 (48 4) = 17 12 = 204 blocks, that's it!
The living room with a length of 64 decimeters and a width of 50 decimeters is paved with floor tiles with a side length of 8 decimeters, a total of 50 pieces, which will not be wasted, and some floor tiles need to be cut and used.
Now I didn't say anything about the unit of the decimeter, right? 5m long, wide, area is, a brick area is, block, damage rate in view of the area, just add 5 pieces, if there are too many gaps in the place, you need to add a few more, if you want a pattern of floor tiles, it is not easy to say.