An x-ray photon of energy 3.20 * 10-15 j has what wavelength?

There is an inverse relationship between the energy and the wavelength of the photon as it is shown in the equation below,

E = hc / λ

where E is energy, h is Planck's constant equal to 6.626 x 10^-34 J/s, c is the speed of light equal to 3 x 10^8 m/s, and λ is wavelength. Calculating for wavelength,

λ = (6.626 x 10^-34 J/s) (3 x 10^8 m/s) / (3.20 x 10^-15 J)

λ = 6.2 x 10^-11 m