- Thread starter
- #1

- Thread starter jacks
- Start date

- Thread starter
- #1

- Admin
- #2

- Mar 5, 2012

- 9,773

If you are allowed mod calculation and Euler's phi function, you can use >>this<<.Calculation of $57^{th}$ digit in the decimal expansion of $\displaystyle \frac{1}{57}$

It gives you the period of the decimal expansion, meaning it suffices to calculate a decimal that comes much earlier in the expansion.