To divide \( 86\sqrt{2} \), we would typically need a number to divide it by. Since your instructions aren't clear about by what you want to divide \( 86\sqrt{2} \), I'll clarify how to express it in the simplest radical form.
If you are looking to simplify \( 86\sqrt{2} \):
The expression \( 86\sqrt{2} \) is already in a simplified form.
Thus, the answer is: "This expression is already simplified and cannot be divided further."