TeX source:

\begin{align*} \frac{1}{3} &= \overline{0}.\overline{3} = \cdots 000000000000000.333333333333333\cdots \\ \\ \frac{1}{4} &= \overline{0}.25\overline{0} =...000000000000000.250000000000000\cdots \end{align*}