Answer
$303.8\;nautical \; miles$.
Work Step by Step
$1\;statute\; mile = 0.868\;nautical \; miles$
Multiply both sides by $350$.
$350\times 1\;statute\; mile =350\times 0.868\;nautical \; miles$
Simplify.
$350\;statute\; mile =303.8\;nautical \; miles$.