At one point in their orbits, Earth and Mars are separated by a distance of $8\mathrm{.}14$x $10^7$ km$.$ If the mass of the Earth is $5\mathrm{.}97$ x $10^24$ kg and the mass of Mars is $6\mathrm{.}42$ x$10^23$ kg$,$ what is the magnitude of gravitational force between them and the resulting acceleration of the Earth?