Alright, let's work through 8840 times 8912 step by step
8840 × 8912 = 8912 × (8840)
+ 8912 × 0 that equals 0
+ 8912 × 40 resulting in 356480
+ 8912 × 800 that results in 7129600
+ 8912 × 8000 which equals 71296000

= 78782080
