A problem asked me to find just K rather than Keq is there a different route to take? Because I did it the same way as you would find Keq but the answer was incorrect.

Post the problem? K can be interpreted as many different things and having the context in which it is used would be helpful

For the reactions system 2H2(g) + S2(g) 2H2S(g), a 1.00 liter vessel is found to contain 0.50 moles of H2, 0.020 moles of S2, and 68.5 moles of H2S. Calculate the numerical value of the Keq of this system. (format: 3.4e4 = 3.4 x 104)