At 298 K the following elementary equilibria are established:
Step 1: A(g) ⇌ B(g) K1=4.0×102
Step 2: B(g) ⇌ C(g) K2=3.0×10−3
Determine the equilibrium constant, K, for the overall reaction A(g) ⇌ C(g) at 298 K. Provide your answer to two significant figures.