Alright, let's work through 6991 times 8205 step by step
6991 × 8205 = 8205 × (6991)
+ 8205 × 1 that results in 8205
+ 8205 × 90 that equals 738450
+ 8205 × 900 that results in 7384500
+ 8205 × 6000 that equals 49230000

= 57361155
