Alright, let's work through 80459298 times 85687458 step by step
80459298 × 85687458 = 85687458 × (80459298)
+ 85687458 × 8 what gives us 685499664
+ 85687458 × 90 what gives us 7711871220
+ 85687458 × 200 what gives us 17137491600
+ 85687458 × 9000 that is equal 771187122000
+ 85687458 × 50000 what gives us 4284372900000
+ 85687458 × 400000 yielding 34274983200000
+ 85687458 × 0000000 resulting in 0
+ 85687458 × 80000000 producing 6854996640000000

= 6894352718084484
