Find the gravitational force of the sun on Mercury

[chris_0101]

Homework Statement

Find the gravitational force of the sun on Mercury
M_sun = 1.98892 x10^30 kg
M_mercury = 3.3022 x10^23 kg
Distance of sun and mercury = R = 6.863 x10^10
G = 6.67 x10^-11

Homework Equations

F_G = GM_sunM_mercury/R^2

The Attempt at a Solution

I simply plugged in the given values (which I found from wolfram alpha) into the formula for F_G and I calculated the answer to be:
9.300 x10^21 N

However, the answer is not correct. If anyone can correct my mistake, that would be greatly appreciated.

Thanks

 

[QuarkCharmer]

Where did you get the distance from mercury to the sun, and is it a measurement from the center of the sun to the center of mercury? If not, you may have to add in the radii of the two.