If $80 \mathrm{g}$ of copper sulphate ${\mathrm{CuSO}}_4·5{\mathrm{H}}_2\mathrm{O}$ is dissolved in deionised water to make $5 \mathrm{L}$ of solution. The concentration of the copper sulphate solution is $x\times {10}^{-3}\text{ mol }{L}^{-1}.$ The value of $x$ is _____.

$[\text{Atomic masses }\mathrm{Cu} : 63.54\mathrm{u}, \mathrm{S} : 32\mathrm{u}, \mathrm{O} : 16\mathrm{u}, \mathrm{H} : 1\mathrm{u}]$