Consider a rectangle with dimensions $l = 1234567891$ and $b = 1987654321$. A point is selected uniformly at random within the rectangle. From this point, a circle is drawn with a radius chosen uniformly between $0$ and the maximum possible radius that allows the circle to remain entirely within the rectangle. What is the expected value of the $\frac{\text{area of circle}}{π} \mod 10^9 + 7$?