A long time
You cannot walk to Australia from another continent!
it takes a few monthes
The Great wall of China would take you about 2 years and seven months to walk.
no one even knows how long it really is.
It is impossible to walk from San Francisco to China.
It will take exactly 8.13 months to walk around thw Great Wall Of China :D
Mao tse-tung
it take more thane 30 months
depends on how fast you walk
if you walk exactly 1 mph, it should take about 5 houers.
it means to go on a very long walk