Future Value Of Annuity Due Payment

$$Pmt = { FV \Bigl[{ r \over (1 + r) ^ n - 1}\Bigr] \times {1 \over (1 + r)} }$$

$$Pmt = { 53000000.0 $ \Bigl[{ 10.0\% \over (1 + 10.0\%) ^ {20.0} - 1}\Bigr] \times {1 \over (1 + 10.0\%)} }$$

$$Pmt = 841236.47 $$$