Alright, let's work through 8813 times 8407 step by step
8813 × 8407 = 8407 × (8813)
+ 8407 × 3 which equals 25221
+ 8407 × 10 giving us 84070
+ 8407 × 800 that equals 6725600
+ 8407 × 8000 resulting in 67256000

= 74090891
