It is safe to walk any number of miles. Limited only by your stamina.
You can walk fo about 2 miles
You'd have to walk 500 miles, then walk 500 more.
3.8 miles = 611550.72 cm.
You will walk 8.04672 km
20
3.10686 miles.
3.2 miles
2.5k is 1.5 miles
about 532.5 miles
It depends on how fast you walk.
I'm not really sure how many miles the Proclaimers would walk... but I know that I would walk 500 miles and I would walk 500 more.... (da da da, da da da) lol :)
gandhi walked 241 miles