Alright, let's work through 98940878 times 84591123 step by step
98940878 × 84591123 = 84591123 × (98940878)
+ 84591123 × 8 producing 676728984
+ 84591123 × 70 giving us 5921378610
+ 84591123 × 800 that equals 67672898400
+ 84591123 × 0000 giving us 0
+ 84591123 × 40000 producing 3383644920000
+ 84591123 × 900000 yielding 76132010700000
+ 84591123 × 8000000 that equals 676728984000000
+ 84591123 × 90000000 producing 7613201070000000

= 8369519980625994
