A rectangular park is $42 \mathrm{m}$ long and $36 \mathrm{m}$ wide. Two cross paths, one parallel to the length and the other parallel to the breadth are constructed in the middle of the park. The path parallel to its length is $3 \mathrm{m}$ wide and that parallel to the breadth is$2.5 \mathrm{m}$ wide. The total area of the path is $k {\mathrm{m}}^2$. Find the value of $k$ up to one decimal place.