# Calculating molal depression constant from latent heat of fusion

Calculate molal depression constant of water if latent heat of fusion of ice at $0^\circ \text C$ is $80 \text{ cal/g}$.

All I could find was the equation $K_f=\frac{0.002T^2}{L_f(\text{in cal/g})}$ at http://www.sciencehq.com/chemistry/depression-of-freezing-point.html