From Colonel By S.S., WCIPEG Migration
$$\displaystyle D = \displaystyle\sum_{i = 0}^{\min{(|S|; 300)}} 0.98514^i \times S[i]$$
![\displaystyle D = \displaystyle\sum_{i = 0}^{\min{(|S|; 300)}} 0.98514^i \times S[i]](https://static.dmoj.ca/mathoid/e031def1d5880b72a1e86e55957cc4e54acb4231/svg)
$$\displaystyle D = \displaystyle\sum_{i = 0}^{\min{(|S|; 300)}} 0.98514^i \times S[i]$$