Assume that long integer is e
So A = (E 1) / (256 * 256 * 256)
B = (e 1-a * 256 * 256 * 256) / (256 * 256)
C = (E 1-A * 256 * 256 * 256-b * 256 * 256) / 256
D = (E 1-A * 256 * 256 * 256-b * 256 * 256-c * 256)
