CORRECTION: VOLUME was in liters not ml as I wrote....answer will be 1000 times greater
Total mass = 4.44 x 10^22 liters x 1.46 gm/ml x 1000ml/l then multiply this by .037 (3.7%) to get salt mass in GRAMS then divide by 1000 to get KILOgrams
4.44 x 10^25 x 1.46 x .037 / 1000 = .0002398 x 10^25 kg = 2.398 x 10^21 kg sodium chloride