The reaction of 1 mole of nitrogen gas with 3 moles of hydrogen gas to form two moles of ammonia has an equilibrium constant of 5 x 10^-2 at 700 kelvins. What is the equilibrium constant of the decomposition reaction of 4 moles of ammonia to form 6 moles of hydrogen gas and 2 moles of nitrogen gas, at the same temperature and volume?