Find the mass of nitrogen in $1 \mathrm{kg}$ of ${\mathrm{KNO}}_3$.

The answer should be in grams. Give your answer as the nearest integer

(Atomic masses of $\mathrm{K}=39 \mathrm{g}, \mathrm{N}=14 \mathrm{g}, \mathrm{O}=16 \mathrm{g}$.)