(-8 C)/(4*pi*epsilon_0 *(2.45967 m)^2) in (Newtons/coulomb)
(-8 C) / (4 * pi * electric constant * ((2.45967 m)^2)) = -1.18844121 ¡Ñ 1010 Newtons / Coulomb
How clever !
However when I tried this, it couldn't calculate the answer for me. When I changed m (meter) to mm, it worked fine. But when I changed C to nC, it didn't work.