Calculate the value of the equilibrium constant Kc?

Consider the following reaction: Fe^3 +(aq) + SCN^ -(aq)=FeSCN^2 +(aq) A solution is made containing an initial Fe^3 + of 1.0×10−3 M and an initial SCN^ - of 8.2×10−4 M. At equilibrium, FeSCN^2+ = 1.8×10−4 M.