Alright, let's work through 77480445 times 18728864 step by step
77480445 × 18728864 = 18728864 × (77480445)
+ 18728864 × 5 what gives us 93644320
+ 18728864 × 40 resulting in 749154560
+ 18728864 × 400 resulting in 7491545600
+ 18728864 × 0000 which equals 0
+ 18728864 × 80000 producing 1498309120000
+ 18728864 × 400000 resulting in 7491545600000
+ 18728864 × 7000000 that is equal 131102048000000
+ 18728864 × 70000000 producing 1311020480000000

= 1451120717064480
