Alright, let's work through 8209 times 9903 step by step
8209 × 9903 = 9903 × (8209)
+ 9903 × 9 giving us 89127
+ 9903 × 00 what gives us 0
+ 9903 × 200 giving us 1980600
+ 9903 × 8000 what gives us 79224000

= 81293727
