Example:
15 GHz = 5.003461e+16 wavelength in petametres
1 GHz = 3.335641e+15 wavelength in petametres | 1 wavelength in petametres = 2.997925e-16 GHz
Conversion Steps:
15 × (1e+9 / 2.997925e-7) = 5.003461e+16