No problem, we've got 8890 and 8991 to multiply
8890 × 8991 = 8991 × (8890)
+ 8991 × 0 producing 0
+ 8991 × 90 producing 809190
+ 8991 × 800 that equals 7192800
+ 8991 × 8000 which equals 71928000

= 79929990
