I have bought a piece of open plot in 2001 for a sum of 900000. Sold in 2011 for 12000000. At the time of selling the plot, I have a residential flat on my name another residential flat as joint owner with my wife. My question is, can i re-invest the capital gains in any other property so that I can avoid paying the tax. If no, How much I have to pay the tax. Please advise.