The number of circles that will fit inside the area of larger circle? Let's say circle $\omega_1$ has a diameter $X$. Let $X&gt;Y$; $Y\in \mathbf{R}^{+}$. How many circles with diameter $Y$  will fit inside $\omega_1$?

Is there a formula for this?
$${{\pi {X^2}} \over {\pi {Y^2}}}$$ 

=$${{{X^2}} \over {{Y^2}}}$$
$${{\pi {X^2}} \over {\pi {Y^2}}}$$ 

=$${{{X^2}} \over {{Y^2}}}$$