How many quarters to make $100?

I'm curious, how many quarters would one need to accumulate in order to reach the sum of $100? It's a straightforward question, but I'm interested in understanding the mathematical breakdown behind it. Each quarter, of course, is worth 25 cents, so I'm wondering how many of these coins would be necessary to reach the $100 mark. Is there a simple formula or method for calculating this? I'm eager to learn the answer and understand the process involved.