How to prepare of 1000 (1 liter) of normal saline?

Calculation : 

• 0.9% Na cl solution
• 0.9 gm in 100 ml
• 100 ml normal saline container 0.9 gm
• 1 ml normal saline container (0.9/100) gm
• 1000 ml normal saline container (0.9*1000)/100 gm= 9 gm

Procedure:

• At first 9 gm of sodium chloride (Nacl) are weighted with balance. 
• 600 ml of distilled water is taken in a beaker/volumetric flask and added 9 gm Nacl.
• Mixed it properly then distilled water is added up to 1000 ml. 
• Then again mixed it with the help of stirrer. Transferred it to the reagent bottle and labeled.Now 1000 ml of normal saline is prepared.