If you Invest 1500 a month for 20 yrs and earn 9 percent What is the worth today?

If you Invest 1500 a month for 20 yrs and earn 9 percent What is the worth today?
392400

Total Months: 240
Monthly Investment 1500
Total Investment= Number of Months x Investment

=240 x 1500
=360,000 x 9/100
= 32400
=360,000 + 32,400
=392,400