The article says more than 100 miles, that's 1 significant figure, and likely somewhere in the 100-120 mile range. More than 160km is the appropriate conversion, and indeed what the article says, it's likely 160-200km.
If I say it's 50km to somewhere, an appropriate conversion would be 30 miles, not 31.07 miles.
If I say it's 50km to somewhere, an appropriate conversion would be 30 miles, not 31.07 miles.