What is the electric field at a location vector b m due to

What is the electric field at a location vector b = <-0.4, -0.1, 0> m, due to a particle with charge +4 nC located at the origin?

Here ,

for the vector b

b = -0.4 i - 0.1 j

|b| = sqrt(0.4^2 + 0.1^2) = 0.412 m

Now , for the electric field

E = k * q * b/|b|^3

E = 9 *10^9 * 4 *10^-9 * ( -0.4 i - 0.1 j )/0.412^3

E = 513 * ( -0.4 i - 0.1 j ) N/C

E = -205.44 i - 51.36 j

the electric field at this point is (-205.44 i - 51.36 j ) N/C