Wavelength of radio with a frequency 90.7 MHz?

Given frequency, $$f=90.7\text{ MHz}=90.7\times10^6\text{ Hz}$$

The wavelength, $$\lambda$$ of a radio wave is given by,

$$\lambda=\frac{c}{f}$$

where, $$c$$ is the speed of light $$(3\times10^8\text{ m/s}).$$

$$\lambda=\frac{3\times10^8\text{ m/s}}{90.7\times10^6\text{ Hz}}=\boxed{3.308\text{ m}}$$