You're out by a factor of a 10^4. You forgot to divide by 1000 to get KW from W, and you accidentally scaled everything up by 10, too. Still, the correct figure is meaningless too.
I cannot trust your declaration of meaningless, since you seem to think that KW somehow matters to his calculation. There is no term that is originally in KW (thus requiring conversion) nor is there any term which he presents in terms of W which is usually presented in terms of KW (thus having a hidden error).
