Subsequent announcements are just going to see this happen each time.
Current numbers
DSO 190Mt x AU$10/t = $1.9B
Ita 1Bt x AU$1 = $1B (assuming US Aussie parity)
No. Shares approx 1.9B
Value per share $2.9B/1.9B = $1.52/share
Please correct if this is too simplistic.