Use RT/F = 0.059 or 0.06 It will simplify your calculations.
Note:- I have converted ln into log. So formula becomes:- $$E_{\text{cell}}=E^0_{\text{cell}}-\frac{0.059}{n}\log\frac{[\text{Products}]}{[\text{Reactants}]}$$
Just try this in problems. Calculations would become easier.