The Mass of a Proton Is 1

The mass of a proton is 1.673 × 10^{- 24} g. The mass of a neutron is 1.675 × 10^{- 24} g. The mass of the nucleus of an ⁵⁶Fe atom is 9.289 × 10^{- 23} g. What is the nuclear binding energy (in J) for ⁵⁶Fe?
(c = 3.00 × 10⁸ m/s)

A) 8.36 × 10^{- 9}
B) 7.72 × 10^{- 8}
C) 7.72 × 10^{- 11}
D) 2.57 × 10^{- 16}
E) 6.07 × 10⁶