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\section{Investigation}  Let $d;n$ mean repeat the digit $d$, $n$ times. Let $|$ be a digitwise concatenation, such that $2|34|6=2346$ $2|3;4|6=233336$  This allows constants to be created for example \begin{equation} C=\lim_{n\to\infty} \frac{1|3;n|8}{2|8;n|7}