Alright, let's work through 80278604 times 10429476 step by step
80278604 × 10429476 = 10429476 × (80278604)
+ 10429476 × 4 resulting in 41717904
+ 10429476 × 00 what gives us 0
+ 10429476 × 600 producing 6257685600
+ 10429476 × 8000 that results in 83435808000
+ 10429476 × 70000 yielding 730063320000
+ 10429476 × 200000 yielding 2085895200000
+ 10429476 × 0000000 yielding 0
+ 10429476 × 80000000 yielding 834358080000000

= 837263773731504
