Four years ago, Company PJ acquired $1,000$ acres of undeveloped land. On the date of the exchange, the land's FMV was $$700,000.$ During the past four years, the land appreciated in value by $$600,000$ a recent appraisal indicated that it is worth $$1\mathrm{.}3$ million today. However, if Company PJ sells the land for $$1\mathrm{.}3$ million, the taxable gain will be $$825,000.$ Can you explain this result?