With letters?

Look at this comparison. FWI the $\frac{numerator}{denominator}$ format is used just to show you. does not mean divide. $\frac{a}{1}$ $\frac{b}{10}$ $\frac{c}{100}$ and $\frac{cba1}{0.1}$ $\frac{cba2}{0.01}$

So on and so forth. What is the number gcccbbbbbbbbbacba1cba1cba4