Alright, let's work through 8981 times 8982 step by step
8981 × 8982 = 8982 × (8981)
+ 8982 × 1 that is equal 8982
+ 8982 × 80 what gives us 718560
+ 8982 × 900 giving us 8083800
+ 8982 × 8000 producing 71856000

= 80667342
