A mixture initially contains a, b, and c in the following concentrations: [a] = 0. 350 m, [b] = 1. 40 m, and [c] = 0. 700 m. The following reaction occurs and equilibrium is established: a + 2b ⇌ c at equilibrium, [a] = 0. 170 m and [c] = 0. 880 m. Calculate the value of the equilibrium constant, kc. Express your answer numerically.