9. In order to effectively improve the "sandstorm" phenomenon, a region attaches great importance to environmental protection, and the area of green vegetation is on the rise. According to the survey, from 1986 to 1995 over 10 years, it increased by $2 \%$ every two years, and in 1994 and 1995, 8.15 million $\mathrm{m}^{2}$ of vegetation was planted. The local government has decided to continue developing at this rate for the next 10 years. Therefore, from 1996 to 1999, the total area of green vegetation planted will be _____ million $\mathrm{m}^{2}$ (accurate to the nearest million $\mathrm{m}^{2}$).
9. $1679.815(1+2 \%) + 815(1+2 \%)^{2} \approx 1679$.