A body of mass $5 \mathrm{~kg}$ moving with a uniform speed $3 \sqrt{2} \mathrm{~ms}^{-1}$ in $X-Y$ plane along the line $y=x+4$. The angular momentum of the particle about the origin will be _________ $\mathrm{kg} \mathrm{~m}^2 \mathrm{~s}^{-1}$.