The stomach fluid in human contains HCl, KCl and NaCl. The stomach fluid is highly acidic and plays an important role in the digestion of food as well as killing of bacteria. The increased acidity may lead to abdominal pain, nausea, bloating, and heartburn. Such a patient is prescribed antacid tablet which mainly contains aluminium hydroxide with molar mass 78. If the concentrations of HCl, KCl and NaCl are $$0.01\,\mathrm{M}$$ each and the stomach fluid volume is 2 litre, the amount of $$\mathrm{Al(OH)_3}$$ required to neutralize the fluid will be