Hi, can someone evaluate this limit? I need it for a mathematical model, so, technically, I'm allowed to use technology (Mathematicagives the result as approximately 23.7), but if someone knows an easy way to solve this, it would be better.

$\displaystyle \lim_{n \to \infty} \frac{90n}{\displaystyle\sum_{i=0}^{4n} 0.975^ \frac{i}{n}}=?$

Thanks.