which product is greater than 1 x 10^3
(2 x 10^-7) x (2 x 10^-2)
(2 x 10^3) x ( 2 x 10^-3)
(2 x 10^-4) x (2 x 10^-2)
(2 x 10^2) x (2 x 10^2)

i need help