A ship sets sail from port A (86o N, 56o W) for port B (86o N, 64o W), which is close by. Find the distance the ship covered from port A to port B, correct ...

A ship sets sail from port A (86o ${}^{\mathrm{<br>}}$N, 56o ${}^{\mathrm{<br>}}$W) for port B (86o ${}^{\mathrm{<br>}}$N, 64o ${}^{\mathrm{<br>}}$W), which is close by. Find the distance the ship covered from port A to port B, correct to the nearest km.

[Take π = 3.142 and R = 6370 km]