What is the binding energy (KJ/mole) of Zinc-64, whose mass is 63.92914 g/mole?

Question

NOTE: the answer should be a positive number

Answer 1

30(1.00727646688) + 34(1.008665) - 63.92914 = 0.5837640064 g/mol
(0.5837640064 g/mol)(1 kg/1,000 g)(1 kJ/1,000 J)(299,792,458 m/s)^2
BE = 5.246609E+10 kJ/mole