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Vehicle mathematics
The number 8.

The highway here refers to the road used to undertake transportation. For example, passing cars, rickshaws, horse-drawn carts, motorcycles and so on carry many vehicles, and their pedestrians can pass according to traffic rules.

For example, since the expressway was built in our village, it is very convenient to go out and enter the city. Now the expressways extend in all directions, and it is very convenient and smooth to go out and do things, so the number of expressways is eight.