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so its 4pir^2 * KeF/r^2 ?

so is now keq * 4pi?

so now q/Eo?

Exactly.

sorry if i may ask,whats Eo?

That's epsilon, a greek letter that looks like E. I describe it above.

does it have a value?

i mean my answer becomes 516/? =

http://en.wikipedia.org/wiki/Vacuum_permittivity ε0 ≈ 8.854187817620... × 10−12

that's *10^-12

not accepting my answer :(

516/(8.85*10^-12) = 5.827*10^13N*m^2/C

is it the right unit?