100/3E-11=

Maybe this is what you mean ?

$$\\\frac{100}{3}\times 10^{-11}\\\\ 33.\bar{3}\times 10^{-11}\\\\ 3.3\bar{3}\times 10\times 10^{-11}\\\\ 3.3\bar{3}\times 10^{-10}\\\\ \frac{3.3}{10^{10 }}$$