The digit in the unit's place in the square root of 15876 is = ?

$$\eqalign{ & \,\,\,\,\,\,1|\overline 1 \,\,\overline {58} \,\,\overline {76} \,(126 \cr & \,\,\,\,\,\,\,\,\,|1 \cr & \,\,\,\,\,\,\,\,\,| - - - - - - - - \cr & \,\,22|\,\,\,\,\,\,58 \cr & \,\,\,\,\,\,\,\,\,|\,\,\,\,\,\,44 \cr & \,\,\,\,\,\,\,\,\,| - - - - - - - - \cr & 246\,|\,\,\,\,\,\,\,14\,76 \cr & \,\,\,\,\,\,\,\,\,|\,\,\,\,\,\,\,\,14\,76 \cr & \,\,\,\,\,\,\,\,\,| - - - - - - - \cr & \,\,\,\,\,\,\,\,\,|\,\,\,\,\,\,\,\,\,\,\,\,\,x \cr & \,\,\,\,\,\,\,\,\,| - - - - - - - \cr & \therefore \sqrt {15876} = 126 \cr} $$