Relax. Everything's under control.
If you use up all your exclamation points now, then
you won't have any left when you really need one.
(1.4 x 10⁵ newton/coulomb) x (-1.6 x 10⁻¹⁹ coulomb)
= (1.4 x 10⁵ x -1.6 x 10⁻¹⁹) newton-coulomb/coulomb
= - (1.4 x 1.6) x 10⁵⁻¹⁹ newton
= - 2.24 x 10⁻¹⁴ newton
