Hydrofluoric acid and water react to form fluoride anion and hydronium cation, like this: HF(aq) + H_2O(l) rightarrow F^- (aq) + H_3O^+ (aq) At a certain temperature, a chemist finds that a 9.4 L reaction vessel containing an aqueous solution of hydrofluoric acid, water, fluoride anion, and hydronium cation at equilibrium has the following composition: Calculate the value of the equilibrium constant K_c for this region. Round your answer to 2 significant digits.