$${d = \frac{p}{10e} = \frac{6,2 \times 10^{-30}\, \mathrm{C \cdot m}}{(10)(1,60 \times 10^{-10}\, \mathrm{C})} \\ = 3,9 \times 10^{-12}\, \mathrm{m} = \underline{\underline{3,9\, \mathrm{pm}}}}$$