Alright, let's work through 84904336 times 65378281 step by step
84904336 × 65378281 = 65378281 × (84904336)
+ 65378281 × 6 what gives us 392269686
+ 65378281 × 30 resulting in 1961348430
+ 65378281 × 300 that equals 19613484300
+ 65378281 × 4000 yielding 261513124000
+ 65378281 × 00000 giving us 0
+ 65378281 × 900000 what gives us 58840452900000
+ 65378281 × 4000000 which equals 261513124000000
+ 65378281 × 80000000 resulting in 5230262480000000

= 5550899537126416
