Calculate the density of a neutron star with a radius 1.69 x 10^4
m, assuming the mass is distributed uniformly. Treat the neutron
star as a giant nucleus and consider the mass of a nucleon 1.675 x
10^-27 kg. Your answer should be in the form of N x 10^17 kg/m3.
Enter only the number N with two decimal places, do not enter unit.