plss dong :(( helpp mee

F = k q1 q2 / r^2
= 9x10^9 x 6x10^-6 x 3x10^-6 / (0,3)^2
= 1800 x 10^-3 = 1,8 N

F = k Q1 Q2 /r²
F = (9 x 10^9)(6 x 10^-6)(3 x 10^-6)/(3 x 10^-1)²
F = (9 x 18 x 10^-3)/(9 x 10^-2)
F = 18 x 10^-3--2
F = 18 x 10^-1
F = 1,8 N