Alright, let's work through 8099 times 9580 step by step
8099 × 9580 = 9580 × (8099)
+ 9580 × 9 that results in 86220
+ 9580 × 90 which equals 862200
+ 9580 × 000 which equals 0
+ 9580 × 8000 giving us 76640000

= 77588420
