The speed of sound in sea water is about 1422 m/s. If a sound wave has a frequency of 289 Hz, what is its wavelength in sea water?

The speed of sound in sea water is about 1422 m/s. If a sound wave has a frequency of 289 Hz, what is its wavelength in sea water?
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The formula that relates speed of a wave, v; frequency, f; and wavelength, $\lambda$ ; is
$v=\lambda \ast f$
Therefore
$1422\frac{m}{s}=\lambda \ast 289Hz$
$\lambda =\frac{1422\frac{m}{s}}{289Hz}$
The unit Hz is equivalent to ${s}^{-1}$. Therefore the last equation can be simplified as follows:
$\lambda =\frac{1422\frac{m}{s}}{289{s}^{-1}}=\frac{1422}{289}\frac{m}{\text{⧸}s}\ast \text{⧸}s=4.92m$