Chemistry

1 A(g) + 1 B(g) ==> 1 C(g)

Calculate the value of Kc assuming the equilibrium concentrations of the three species are [A] = 6.513 x 10-2, [B] = 2.533 x 10-2, and [C] = 3.446 x 10-2.

I don't get this! I need help on it!D: