That number has no units, and just-plain-numbers don't have wavelengths.
If you mean that number to have the unit of "Hertz", and to be a frequency of, say,
an electromagnetic wave in vacuum, then it's wavelength would be 296.8 nanometers ...
an ultraviolet wave.
1.97987*1010 = 19,798,700,0001.97987*1010 = 19,798,700,0001.97987*1010 = 19,798,700,0001.97987*1010 = 19,798,700,000
Electromagnetic wavelength = speed/frequency = 3 x 108/6 x 1010 = 5 mm
1010
14348907
32,768
I assume you are talking about an electromagnetic wave; in this case, divide the speed of light (300,000,000 meters per second) by the wavelength. You must first convert the wavelength to meters (divide Angstrom by 1010).
32,768
1.01215 = 1.1959353070607165483505410299258
1005 = 10000000000 = 1010
1010 = 10,000,000,000
1010
1010