$83\mathrm{.}6$ m$2$ area and U$=2270$ W$/$ m$2.$ An evaporator with heat distribution is used for storage to feed a boiler. Tap water containing $400$ ppm dissolved solids at $15\mathrm{.}6$ oC is fed to the evaporator by operating at $1$ atm absolute pressure. Saturated water at $115\mathrm{.}6$ oC is ready for use. Calculate the amount of distilled $($pure$)$ water produced per unit production based on the output liquid $800$ ppm solid achievements.