Alright, let's work through 77887600 times 80404476 step by step
77887600 × 80404476 = 80404476 × (77887600)
+ 80404476 × 0 what gives us 0
+ 80404476 × 00 which equals 0
+ 80404476 × 600 that equals 48242685600
+ 80404476 × 7000 that results in 562831332000
+ 80404476 × 80000 what gives us 6432358080000
+ 80404476 × 800000 what gives us 64323580800000
+ 80404476 × 7000000 resulting in 562831332000000
+ 80404476 × 70000000 what gives us 5628313320000000

= 6262511664897600
