In Niels Bohr's 1913 model of the hydrogen atom, an electron circles the proton at a distance of 3.85 x 10^-11 m with a speed of 1.08 x 10^6 m/s. The permeability of free space is 1.25664 x 10^-6 T m/a. Compute the magnetic field strength that this motion produces at the location of the proton.