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Consider a sphere of radius $4$, centered at the origin, with outward unit normal $\hat{n}$ on its surface $S$. The value of the surface integral $\iint _{s} \left ( \dfrac{2x\hat{i}+3y\hat{j}+4z\hat{k}}{4\pi} \right )\cdot \hat{n} \:dA$ is _________________ *(rounded off to one decimal places)*