A galaxy is moving away from the earth at a speed of $286 \mathrm{km} {\mathrm{s}}^{-1}$. The shift in the wavelength of a red line at $630 \mathrm{nm}$ is $x\times {10}^{-10} \mathrm{m}$. The value of $x$, to the nearest integer, is ___ .

[Take the value of the speed of the light $c$, as $3\times {10}^8 \mathrm{m} {\mathrm{s}}^{-1}$]