Pomylili się w obliczeniach, gdyż o

Pomylili się w obliczeniach, gdyż o zmroku przedarli się do miasta przez pola.

Results (English) 1:

Romy Schneider in the calculation, because at dusk the city forced their way through the fields.

Results (English) 2:

They made a mistake in the calculation, as dusk broke into the city through the fields.

Results (English) 3:

have miscalculated, because twilight broke through to the city through the fields.